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Tiger shark

The tiger shark (Galeocerdo cuvier) is a large in the family Carcharhinidae, order , distinguished by its stocky body, blunt snout, and distinctive transverse stripes on juveniles that resemble tiger markings and typically fade in adults. It inhabits coastal and pelagic waters of tropical and subtropical oceans worldwide, from shallow reefs and lagoons to depths exceeding 350 meters, with a preference for warmer temperatures above 20°C. Females can attain lengths of up to 5.5 meters and weights over 600 kilograms, making it one of the largest , while males are generally smaller at around 4.25 meters. Its is exceptionally broad and opportunistic, encompassing , rays, smaller sharks, sea turtles, seabirds, marine mammals, crustaceans, squid, and even non-food items like tires and license plates, facilitated by uniquely serrated, triangular teeth suited for slicing through tough materials such as turtle shells. This versatility positions it as a key in maintaining balance, though its curiosity toward novel objects contributes to its involvement in human encounters. The species accounts for the second-highest number of documented unprovoked attacks on humans after the , with over 140 incidents recorded globally, often in murky coastal waters where misidentification of surfers or swimmers as prey occurs. Despite its fearsome reputation, attacks remain rare relative to human ocean activity, and the shark's Near Threatened status on the stems primarily from targeted fisheries for fins, meat, and liver oil, rather than retaliatory killings. Conservation efforts focus on quotas and protected areas to curb , as population declines have been noted in regions with intensive shark .

Taxonomy

Classification and Phylogeny

The tiger shark, Galeocerdo cuvier (Péron & Lesueur, 1822), is classified within the Eukarya, Animalia, phylum Chordata, subphylum Vertebrata, class , subclass , order , family Carcharhinidae, genus , and G. cuvier. The binomial name honors , a naturalist, with the genus deriving from terms galeos () and kerdos (fox or cunning, alluding to its opportunistic predation). Originally described as Squalus cuvieri based on specimens from , the species was later reassigned to by Müller and Henle in 1839, who designated Squalus arcticus (a junior synonym) as the type. Phylogenetically, G. cuvier is the sole extant species in its monotypic genus, embedded within the diverse requiem shark family Carcharhinidae, which comprises over 50 species adapted to coastal and pelagic environments. Molecular analyses place Galeocerdo as a distinct lineage within Carcharhiniformes, with ribosomal ITS1 sequences indicating basal divergence from genera like Carcharhinus and Prionace, reflecting adaptations for broad dietary versatility and viviparity without placental nourishment (a secondary loss relative to other carcharhinids). The genus's evolutionary history spans the early Eocene (approximately 56 million years ago), with fossil teeth documenting high morphological disparity and over 60 nominal extinct species or relatives, though revisions based on dental morphometrics reduce valid taxa to around 20, highlighting a pattern of rapid diversification followed by extinction events tied to paleoenvironmental shifts. Modern G. cuvier likely emerged around 5.3 million years ago in the late Miocene, with ancestral forms exhibiting serrated, recurved teeth suited for scavenging and predation, as evidenced by Miocene fossils from the Paratethys Sea showing continuity in cusp morphology. This deep-time record underscores Galeocerdo's resilience, with lineage persistence linked to opportunistic feeding rather than specialized niches, contrasting with more constrained carcharhinid clades.

Morphology and Physiology

Size and Body Structure

The tiger shark (Galeocerdo cuvier) exhibits in size, with adult females generally larger than males. Females typically attain lengths of 3 to 4 meters total length (TL) at maturity, while males mature at around 2.5 to 3 meters TL. Maximum verified lengths reach approximately 5.5 meters TL, with weights exceeding 900 kilograms, though exceptional reports of up to 7.5 meters exist but lack robust verification. The body plan is , characterized by a robust, spindle-shaped form that optimizes hydrodynamic efficiency for cruising and bursts of speed. This shape features a broad, flattened head with a short, bluntly rounded and relatively large eyes positioned dorsolaterally. The mouth is large, equipped with long labial furrows extending posteriorly, and the trunk tapers gradually toward the tail. Pectoral are long and broad, aiding in lift and maneuverability, while the first is tall and positioned forward, with its origin aligned over the pectoral fin base. The caudal fin is heterocercal, with a pronounced upper lobe that provides , enabling powerful suited to the shark's predatory . Juveniles display ontogenetic shifts, including a relatively narrower head and less elongated caudal fin compared to adults, which broaden and elongate with growth to enhance predatory capabilities. The cartilaginous skeleton supports this structure, offering flexibility and reduced weight for in marine environments. Overall, these adaptations contribute to the tiger shark's status as a versatile apex predator, capable of exploiting diverse prey through sustained swimming and agile turns.

Skin, Dentition, and Coloration

The skin of the tiger shark (Galeocerdo cuvier) consists of a tough, leathery dermis overlaid with placoid scales known as dermal denticles, which are minute, tooth-like structures composed of dentin and enamel. These denticles, shaped like small teeth with posterior orientation and ridged surfaces, minimize hydrodynamic drag by channeling water flow and deter ectoparasites and abrasion from rough substrates or prey struggles. Tiger shark dentition is markedly heterodont, exhibiting distinct upper and lower tooth morphologies optimized for versatile predation on hard-shelled and bony prey. Upper teeth display asymmetrical, compressed crowns inclined distally, with curved mesial edges bearing complex serrations and straight distal edges featuring notches and cusplets for efficient slicing. Lower teeth, by contrast, are more triangular and pointed, facilitating prey grip and manipulation during feeding. This cockscomb-like form undergoes ontogenetic shifts, with juveniles showing less pronounced serrations that develop complexity with growth, and teeth are continually replaced in conveyor-belt fashion to maintain cutting efficacy despite wear. Coloration in the tiger shark serves camouflage functions, with a surface of dark gray to bluish-gray and a pale white ventral side; juveniles emerge with dark spots that coalesce into prominent vertical bars or stripes along the flanks, which fade or become indistinct in adults. These patterns, evoking markings, disrupt the shark's outline against varying light penetration in coastal and pelagic waters.

Sensory Adaptations

The tiger shark (Galeocerdo cuvier) exhibits sensory adaptations common to many shark species, facilitating detection of prey across diverse habitats from coastal reefs to open ocean. These include acute olfaction, electroreception via the , vision optimized for low-light conditions, hearing sensitive to low frequencies, and mechanoreception through the system. Olfaction plays a primary role in long-range prey detection, with olfactory receptors in the nasal sacs capable of identifying and other chemical cues at concentrations as low as 1 part per 10 billion parts . In controlled tests with similar requiem sharks, such scents have been detected at distances of several hundred yards, though currents and dilution limit effective range to under a mile even in optimal conditions. Up to two-thirds of the shark's brain volume is devoted to processing olfactory input, underscoring its primacy in foraging. Electroreception occurs through the , a network of jelly-filled pores concentrated on the and head that detect bioelectric fields generated by muscle contractions in prey, even if buried or concealed. These organs sense fields as weak as those from a , effective at short ranges of a few feet, aiding precise strikes during close encounters. In tiger sharks, this system contributes to their opportunistic predation on hidden or low-movement targets, though sensitivity diminishes in turbid or electrically noisy waters. Vision is adapted for dim environments via a , a reflective layer behind the that amplifies available light, and a that protects the eyes during feeding without obstructing sight. The contains both for low-light sensitivity and cones enabling color discrimination, with sufficient for detecting objects or movement at up to 30 yards in clear water. Tiger sharks show specializations, such as a band of high neuronal density, potentially enhancing detection of surface prey silhouettes against light. However, their overall acuity is lower than humans', relying heavily on motion cues for target identification. Hearing involves inner ears tuned to low frequencies (20–300 Hz), particularly irregular sounds below 40 Hz indicative of distressed prey, detectable over distances exceeding a mile in quiet conditions. The system complements this by sensing pressure waves and vibrations along the body via neuromast organs in a mucous from to tail, allowing perception of nearby movements or water displacements even in the dark or murky conditions preferred by tiger sharks. These mechanosensory inputs integrate with electroreception to refine spatial awareness during hunts.

Habitat and Distribution

Geographic Range

The tiger shark (Galeocerdo cuvier) exhibits a circumglobal distribution in tropical and subtropical waters, primarily ranging between approximately across all major basins. This species occurs in coastal, shelf, and offshore environments, with records extending into warm temperate regions seasonally. In the , tiger sharks are documented from the eastward to , northward to , and southward to , including the and waters. In the Atlantic Ocean, the western distribution spans from Massachusetts, United States, southward to Uruguay, incorporating the Gulf of Mexico and Caribbean Sea, with captures reported as far north as the Grand Banks of Newfoundland. The eastern Atlantic range extends from Iceland to Angola, reflecting adaptability to varying coastal and pelagic conditions. Vagrant individuals have been sighted beyond core tropical zones, such as in higher latitudes during migrations or fisheries encounters.

Environmental Preferences

Tiger sharks (Galeocerdo cuvier) primarily inhabit warm tropical and subtropical marine waters, favoring temperatures between 23°C and 26°C, though they tolerate a broad range from 4°C to 33°C. Their optimal activity occurs in coastal waters around 22°C, where abundance and movement are highest. Mean preferred temperature is approximately 26.4°C, with a recorded range of 15.8°C to 28.9°C based on species distribution models. In terms of depth, tiger sharks are commonly found from the surface to 140 m, occasionally descending to 350 m, and spend most time in the upper 50 m of the . They associate with continental and insular shelves, including inshore reefs, lagoons, channels, and sandy or muddy bottoms, but also venture into pelagic zones. As fully marine predators, tiger sharks prefer full oceanic , though environmental factors like influence their distribution, with studies indicating a role in limiting range alongside and prey availability. They occasionally enter nearshore or estuarine areas when pursuing prey, demonstrating some for brackish conditions, but thrive in open saltwater environments.

Migration and Movement Patterns

Tiger sharks (Galeocerdo cuvier) exhibit predominantly nomadic movement patterns, characterized by high mobility across coastal, shelf, and open-ocean environments rather than fixed seasonal migrations typical of some elasmobranchs. Acoustic and telemetry studies indicate variable residency durations, with individuals often remaining in localized areas for weeks to months before dispersing, influenced by prey availability and environmental cues such as gradients. Long-distance travels exceeding 8,000 km have been recorded, including trans-oceanic crossings, though these are not annual or predictable cycles but opportunistic responses to opportunities. In the Hawaiian archipelago, a network of acoustic receivers tracked tagged tiger sharks over multiple years, revealing strong site fidelity to specific islands or seamounts, punctuated by transient excursions to deeper pelagic zones. Similarly, at the , satellite-tagged individuals displayed residency indices varying by , with higher fidelity during cooler months and broader ranging in warmer periods, suggesting thermal regulation as a driver alongside predation on seasonal prey aggregations. Eastern satellite deployments showed most activity concentrated along continental slopes at depths of 100–500 m, but one shark undertook a 2,000+ km northward migration, highlighting individual variability in dispersal. Philopatry, or return to natal or preferred habitats, is evident particularly in females, with genetic analyses indicating sex-biased dispersal where males range more widely post-maturity. Ontogenetic shifts occur, as juveniles show higher residency near areas while adults expand into oceanic corridors like remote islands and chains critical for transit. Climate-driven changes are altering these patterns in the western North Atlantic, where warming oceans have advanced arrival times at northern latitudes by up to two weeks since the and extended northern reach by approximately 200 km, based on historical sighting and tagging data correlated with anomalies. Such shifts underscore thermal tolerances (optimal 24–28°C) as a primary on movement, with potential cascading effects on prey interactions and human-shark encounters.

Behavior and Ecology

Feeding Strategies

Tiger sharks (Galeocerdo cuvier) exhibit opportunistic feeding strategies, preying on a diverse array of organisms including fishes, elasmobranchs, sea turtles, seabirds, mammals, and cephalopods, while also scavenging carrion and ingesting non-food items such as license plates and tires, earning them the moniker "garbage cans of the sea." Their diet reflects habitat-specific availability, with local prey communities driving composition rather than fixed preferences, underscoring a trophic role. Feeding involves active hunting augmented by scavenging, facilitated by specialized featuring serrated, triangular upper teeth for slicing flesh and pointed lower teeth for gripping, enabling consumption of tough-shelled prey like . Smaller juveniles (<200 cm total length) primarily target fishes and invertebrates, shifting ontogenetically to larger vertebrates as body size increases gape and swimming capabilities, allowing exploitation of expansive habitats and enhanced predation efficiency. In regions like the northwest Atlantic and Gulf of Mexico, stomach content analyses reveal dominance of elasmobranchs and reptiles in adults, with sex-specific variations where females consume more large prey. Hunting tactics emphasize stealth and burst speed, with acute sensory systems detecting prey via electroreception and olfaction over long distances, often ambushing from below or pursuing in open water. Aggregations occasionally form around high-value carcasses, as observed in 2025 off South Africa where multiple sharks shared a decayed whale, indicating kleptoparasitic or cooperative scavenging under resource scarcity. This behavioral plasticity supports efficient energy acquisition across ontogeny and environments, positioning tiger sharks as apex regulators of community structure through predation pressure on abundant, vulnerable species.

Predation Dynamics

Tiger sharks (Galeocerdo cuvier) function as opportunistic apex predators, exhibiting a broad diet that encompasses teleosts, elasmobranchs, marine mammals, reptiles, birds, cephalopods, and crustaceans, with stomach content analyses revealing frequencies such as 54% elasmobranchs and up to 40% mammals in females from South African waters. This generalist feeding strategy reflects exploitation of abundant and accessible prey across benthic and pelagic habitats, including scavenging of carrion alongside active hunting. Empirical data from 628 examined stomachs indicate seasonal variations, with elasmobranch consumption peaking in summer and autumn, and mammal intake higher in winter and spring, underscoring responsiveness to prey availability. Ontogenetic shifts in predation dynamics are pronounced, as smaller individuals (<150 cm total length) predominantly consume teleosts (up to 73% frequency), transitioning to elasmobranchs in medium-sized sharks (150–220 cm), and incorporating larger reptiles, birds, and cetaceans in adults (>220 cm). In waters, prey diversity and size increase with shark length, with human-sized items appearing around 230 cm total length, correlating with expanded ranges and improved predatory capabilities. Juveniles nocturnally near the , while larger sharks extend to surface waters diurnally, facilitating encounters with mobile prey like sea turtles. Hunting employs ambush tactics, particularly against sea , where tiger sharks attack surfacing individuals from below to exploit vulnerabilities during nesting migrations. Prey responses vary; loggerhead show minimal behavioral adjustments despite spatial overlap, potentially due to reduced densities from fishing pressure. Visual cues guide prey detection, with sharks relying on turtle silhouettes and movements, though employ evasion via erratic or submersion. These dynamics position tiger sharks as key regulators of prey populations, influencing behaviors and distributions in tropical and subtropical ecosystems.

Social Interactions

Tiger sharks (Galeocerdo cuvier) are predominantly solitary as adults, foraging and migrating independently outside of transient aggregations driven by resource availability or reproductive needs. They rarely form stable groups, with most interactions limited to opportunistic encounters during nocturnal hunts or diurnal rests, where individuals maintain distance to avoid competition. Communal feeding represents a key exception, as multiple tiger sharks aggregate around large prey carcasses, such as those of whales or sea turtles, exhibiting scavenging behaviors including competitive jostling and sequential feeding bouts. In such events, observed in locations like Prony Bay, , sharks display investigative actions like circling and close passes, potentially assessing dominance or levels among conspecifics. These aggregations are temporary and dissolve once resources deplete, underscoring the ' opportunistic rather than . Mating seasons prompt another form of aggregation, where males pursue females in shallow coastal waters, leading to brief consortships marked by parallel and physical contacts, though without evidence of pair-bonding or territorial defense. Studies using acoustic and network analysis reveal non-random associations, with individuals showing preferences for specific conspecifics, suggesting latent structures that buffer against environmental stressors like provisioning dives. In bait-attracted groups, such as those of mature females in ' Tiger Harbour, dominant behaviors like submission signals and yielding predominate, minimizing aggression in high-density settings. Beyond conspecifics, tiger sharks host commensal remoras ( spp.) that attach to their bodies for transport and feeding on scraps or parasites, a relationship tolerated without apparent disruption to the shark's movement. Non-feeding aggregations, as documented around Fuvahmulah Island in 2023–2024, feature low-threat parallel swimming among females, possibly linked to migratory staging rather than direct social bonding. Overall, these interactions highlight a spectrum from isolation to context-dependent grouping, with no sustained hierarchies or observed.

Ecological Role

The tiger shark (Galeocerdo cuvier) serves as an apex predator in tropical and subtropical marine ecosystems, occupying the top trophic level and exerting top-down control on prey populations across diverse habitats from coastal reefs to pelagic waters. Its broad diet encompasses species from multiple trophic levels, including teleost fishes, elasmobranchs, invertebrates such as cephalopods and crustaceans, reptiles like sea turtles, seabirds, and occasionally marine mammals, enabling it to function as a generalist forager that adapts strategies to local prey availability. This dietary versatility allows tiger sharks to influence community dynamics by suppressing abundant mesopredators and herbivores, though the full extent of population regulation remains incompletely verified in many regions. Predation by tiger sharks can propagate trophic cascades, structuring benthic and pelagic communities; for example, by targeting herbivores such as green , they indirectly mitigate of meadows, fostering habitat resilience and enhancing in coastal . As , tiger sharks consume carrion and diseased individuals, facilitating recycling and reducing organic waste accumulation, which supports overall hygiene. Their across gradients and habitats further amplifies these effects, potentially stabilizing food webs against perturbations like of lower trophic levels. Diminution of tiger shark populations due to human activities risks destabilizing these interactions, underscoring their role in maintaining .

Reproduction and Life History

Mating Behaviors

Tiger sharks exhibit a polygynandrous , in which both males and females with multiple partners without forming pair bonds. Females typically only every three years, reflecting the species' slow reproductive cycle and long period. is generally solitary or involves loose aggregations, as tiger sharks are otherwise solitary hunters that associate primarily during reproductive or feeding events. Mating seasons vary by region and hemisphere. In the , copulation occurs between March and May, while in Hawaiian waters, it peaks in January, with females storing sperm for four to five months until in May to July. In the , delayed fertilization aligns with November to January. These timings suggest environmental cues, such as water temperature or prey availability, influence aggregation for mating, though direct causation remains understudied. During courtship and copulation, males pursue and grasp females aggressively. Observations include a male chasing a female in tight, intricate circles—potentially a pre-copulatory display—before the pair departed together, as documented in the ' Tubbataha Reefs in 2021. To achieve intromission, males bite the female's back, flanks, gills, or pectoral fins, often leaving visible scars or wounds; females possess skin nearly twice as thick as males to mitigate injury. Fertilization is internal, with the male inserting one (a paired ) while often rolling onto his side. Such behaviors prioritize rapid, opportunistic mating over prolonged , consistent with the species' opportunistic .

Gestation and Parturition

Tiger sharks ( cuvier) exhibit , a reproductive mode in which embryos develop from yolky eggs retained within the mother's , hatching internally without a placental connection to the parent, and pups are born live after fully developing. This strategy is unique among carcharhinid sharks, distinguishing tiger sharks from congeners that typically employ placental . Gestation duration in female tiger sharks typically spans 13 to 16 months, though estimates vary slightly across studies, with some reporting 12 to 16 months or up to 16 months specifically. During this period, embryos nourish primarily on reserves, with limited evidence of or intrauterine as in some related species. Litter sizes range widely from 10 to 82 pups, influenced by maternal body size, with averages often cited between 25 and 36 or 30 to 35 individuals. Larger females produce more offspring, correlating positively with total length. Parturition occurs as live birth, with females delivering fully formed pups measuring 50 to 90 cm in total length and weighing 3 to 6 kg at emergence. Birth timing shows regional variation; in the subtropics, such as , it peaks in and , aligning with warmer months that may favor pup survival. Documented captive events reveal litters of around 30 pups, including occasional stillbirths, with postpartum females exhibiting distended uteri indicative of recent delivery. Pups are independent immediately post-birth, possessing functional and swimming capabilities adapted for predatory foraging.

Ontogeny and Growth

Tiger sharks are ovoviviparous, with leading to embryonic within the for a period of 13 to 16 months. Embryos initially rely on nutrition but later employ embryotrophy, a involving direct uptake from uterine secretions or tissues, enabling production of large broods with substantial size at birth. Females deliver litters of 10 to 82 live pups, each typically 51 to 76 cm in total length (TL) and weighing 3 to 6 kg at birth. Neonates emerge fully developed and independent in shallow nursery habitats, bearing distinctive dark tiger-like stripes for camouflage that gradually fade by 6 to 8 years of age as they transition to subadults. Juvenile growth is rapid, often exceeding 100 cm per year in early stages, supporting quick attainment of predatory capability. Overall growth adheres to a von Bertalanffy model, characterized by a growth constant K of 0.31 year⁻¹ and an asymptotic length (L∞) of approximately 403 cm TL. Individuals average 340 cm TL by age 5, with the fastest growers reaching 400 cm TL by that age. Males attain at 226 to 290 cm TL, generally by age 4, while females mature at 250 to 325 cm TL, around age 5. Maximum sizes rarely surpass 450 cm TL, with verified records up to 464 cm TL, though such extremes represent outliers. Wild lifespan averages 27 years.

Conservation Status

Global and Regional Assessments

The International Union for Conservation of Nature (IUCN) classifies the tiger shark (Galeocerdo cuvier) as Near Threatened on its global Red List, a status reflecting that while the species does not currently meet criteria for Vulnerable or higher threat levels, ongoing declines in some populations could elevate risks in the near future. This assessment, conducted in 2019 by specialists including L.C. Ferreira and C.A. Simpfendorfer, attributes suspected global population decreases primarily to targeted fisheries for fins, meat, and liver oil, alongside in non-selective gear, with an estimated 30-50% reduction over three generations in heavily fished areas. The species' wide-ranging, opportunistic nature and relatively high reproductive output contribute to its resilience, preventing a higher threat designation despite these pressures. Regionally, assessments reveal variability tied to local fishing intensities and management. In waters, the tiger shark is similarly rated Near Threatened under national IUCN-aligned evaluations, with the east coast population classified as Depleting by the Status of Australian Fish Stocks (SAFS) due to sustained commercial catches exceeding sustainable yields in some fisheries. Northwestern Atlantic populations show signs of stability or modest recovery, with relative abundance in U.S.-based fisheries increasing gradually since the following regulatory changes like bans, though long-term trends remain uncertain without comprehensive stock data. In contrast, Indo-Pacific regions such as the exhibit unsustainable exploitation levels, contributing to localized declines that underscore the need for region-specific monitoring amid global trade demands. These discrepancies highlight how the species' buffers against uniform threats, but isolated overharvesting can still impair regional ecological roles.

Primary Threats

The primary threat to tiger shark populations is overfishing, encompassing both targeted fisheries and bycatch in non-selective operations. Demand for shark fins, meat, and liver oil drives targeted catches, particularly in regions like the Arabian Sea where exploitation has led to population bottlenecks and reduced reproduction rates. Globally, fishing pressure has contributed to an estimated 30% decline over the past three generations (approximately 53-68 years), prompting the IUCN's Near Threatened assessment. In specific locales, such impacts are pronounced; for instance, Hawaii's tiger shark numbers fell by roughly 50% between 1993 and 2013, attributed primarily to despite few natural predators. exacerbates this, with studies recording retained fishing hooks in 38% of tracked tiger sharks over an eight-year period, indicating frequent interactions with commercial gear. Secondary threats include habitat degradation from coastal development and , though these are overshadowed by direct harvest.

Management and Recovery Efforts

Management of tiger shark (Galeocerdo cuvier) populations focuses on sustainable fisheries practices rather than intensive recovery programs, given the species' global Near Threatened by the IUCN and its to in well-regulated areas. In the United States, the (NMFS) oversees tiger sharks as part of the Consolidated Atlantic Highly Migratory Species Fishery Management Plan, which imposes commercial quotas, minimum size limits (typically 54 inches fork length for large coastal species including tiger sharks), and reporting requirements to prevent overharvest. The 2010 Shark Conservation Act mandates that sharks, including tiger sharks, be landed with fins naturally attached, reducing incentives for and supporting stock sustainability. Regional efforts have shown population stability or recovery where enforcement is strong. In , designated as a since 2011, long-term monitoring via baited remote underwater video stations indicated stable relative abundance of tiger over 35 years, attributed to fishing bans within protected waters. Similarly, U.S. post-1990s reforms, including trip limits and seasonal closures, contributed to recoveries in tiger shark stocks alongside other like scalloped hammerheads, with increases linked to reduced directed pressure. Spatial protections, such as no-take zones in and other Pacific areas, incidentally safeguard tiger shark habitats by prohibiting gillnet and in aggregation sites, fostering localized rebounds hypothesized from habitat suitability models. In , management varies by coast: Western Australian stocks are deemed sustainable under quota systems, while eastern stocks show depletion signals prompting reviews of gillnet fisheries, though no species-specific plans exist. Internationally, compliance with Regional Fisheries Management Organizations (RFMOs) like the International Commission for the Conservation of Atlantic Tunas (ICCAT) includes tiger sharks in aggregate shark quotas, but uneven enforcement in regions like the has led to calls for stricter size limits to protect juveniles and maintain reproductive potential. initiatives, such as tagging and genetic studies by organizations like OCEARCH, inform by tracking migrations and hotspots, though these are monitoring tools rather than direct actions. Overall, effective hinges on enforcement and reduction, with evidence suggesting that regulatory frameworks can stabilize populations without necessitating listings.

Human Interactions

Incidents of Attacks

Tiger sharks ( cuvier) rank second to sharks in the number of documented unprovoked attacks on humans, with 142 confirmed incidents leading to 39 fatalities worldwide. These attacks typically occur in shallow, coastal tropical and subtropical waters where tiger sharks hunt and humans engage in , , or , often triggered by the shark's investigative bites on unfamiliar objects or silhouettes mistaken for prey such as sea turtles or . The species' large size—adults reaching 4–5 meters—and serrated teeth contribute to severe injuries, with a fatality rate of about 27% attributed to extensive damage and occurrences in remote locations limiting rapid medical intervention. Hawaii records the highest concentration of tiger shark incidents, averaging several per year amid high surf activity and the sharks' seasonal residency near shorelines for pupping and feeding. Surfers represent over 60% of victims in these cases, as surfboards can mimic the shape of favored prey when viewed from below in turbid conditions. Other hotspots include northeastern and the islands, where attacks spike during warmer months aligning with shark migration and human beach use. Provoked encounters, such as during , elevate risk but constitute a minority of records maintained by the (ISAF). A widely reported non-fatal attack took place on October 31, 2003, at Tunnels Beach on , , when a 14-foot tiger shark severed the left arm of 13-year-old surfer ; she survived due to immediate aid from companions and returned to competitive within months. Fatal cases, though rarer, underscore the species' potential lethality; ISAF data highlight patterns of multiple bites leading to , as seen in historical Hawaiian incidents where victims succumbed before reaching facilities. Overall, tiger shark attacks remain infrequent relative to human ocean exposure, with annual global unprovoked bites across all species numbering under 100, emphasizing behavioral avoidance—such as avoiding dawn/dusk hours and solitary swims—as effective mitigation over .

Commercial Exploitation

Tiger sharks (Galeocerdo cuvier) are targeted or caught as bycatch in commercial fisheries across tropical and subtropical waters for multiple products, including fins, meat, liver oil, skin, and cartilage. Fins command high value in international trade, primarily destined for Asian markets where they are used in soup preparation, contributing to significant harvest pressure in regions like the Arabian Sea. Meat is utilized locally in artisanal fisheries in countries such as Mexico, Panama, Brazil, and various African nations, often through gillnets or hook-and-line methods. Liver oil, rich in , is extracted for commercial applications in , sunscreens, and pharmaceuticals, with tiger sharks among historically processed for this purpose. Skin is processed into , while cartilage finds use in dietary supplements. In the pelagic longline fishery around the , tiger sharks are incidentally captured, reflecting broader incidental exploitation in tuna-directed operations. Australian commercial catches remain low, though declines in catch rates have been observed elsewhere due to sustained fishing. Exploitation rates indicate heavy pressure in key areas; for instance, in the , the estimated exploitation rate reached 0.71 in assessments from 2025 data, signaling unsustainable levels. Globally, such harvesting has contributed to declines, with fishing mortality estimates like 0.77 year⁻¹ underscoring vulnerability given the species' low reproductive frequency of every three years. Regulations, such as U.S. bans on since 2002, limit practices in some jurisdictions but do not eliminate overall commercial take.

Cultural Representations

In Hawaiian tradition, the tiger shark (Galeocerdo cuvier) holds significance as an 'aumakua, a familial ancestor or that manifests in animal form to offer protection, guidance, and strength to descendants. Families with tiger shark 'aumakua historically avoided harming the species, interpreting encounters as omens or interventions from ancestors, reflecting a broader Polynesian view of sharks as sacred intermediaries between the living and spiritual realms. Among the Yanyuwa Aboriginal people of Australia's , the tiger shark symbolizes a foundational creator being, credited in oral traditions with shaping the region's landscape and waters through its movements. The Yanyuwa, who identify as li-antha wirriyara ("people of the salt water"), integrate the tiger shark into their system and ceremonies, viewing it as an embodiment of sea-country custodianship and ecological interconnectedness. This reverence underscores the shark's role in sustaining cultural laws governing resource use and territorial responsibilities. Tiger sharks appear in broader Australian lore as totemic figures representing power and adaptability, though specific attributions vary by group; for instance, Nyungar traditions associate sharks generally with bravery and shamanic spirits, potentially extending to tiger sharks in coastal narratives. In Fijian mythology, sharks including tiger variants are depicted as ancestral protectors and deities, embodying vigilance over marine domains, though less exclusively tied to the species than in or Yanyuwa contexts. These representations contrast with post-colonial Western portrayals, where tiger sharks often symbolize peril in accounts or , diverging from Indigenous emphases on reciprocity and sanctity.

References

  1. [1]
    Galeocerdo cuvier - Tiger Shark - Animal Diversity Web
    The diet of tiger sharks includes mollusks , birds , snakes , crustaceans , sea turtles , and dugongs . Serrated teeth give this species the ability to ...
  2. [2]
    Tiger Shark – Discover Fishes - Florida Museum of Natural History
    Feb 3, 2025 · Tiger sharks are among the largest of the sharks and are recorded up to 550 cm (18 ft) long. They are known to eat most marine animals, sea birds, the ...
  3. [3]
    Tiger shark - Galeocerdo cuvier - Shark Research Institute
    It feeds on bony fish, sharks, rays, marine turtles, marine mammals, sea snakes, sea birds, crustaceans, octopus and squid, jellyfish, carrion and garbage.Missing: diet | Show results with:diet
  4. [4]
    https://www.iucnredlist.org/species/39378/2913541
  5. [5]
    Galeocerdo cuvier (Péron & Lesueur, 1822) - WoRMS
    Jan 15, 2008 · Galeocerdo cuvier (Péron & Lesueur, 1822) · Biota · Animalia (Kingdom) · Chordata (Phylum) · Vertebrata (Subphylum) · Gnathostomata (Infraphylum) ...
  6. [6]
    The phylogenetic relationship within the genus Carcharhinus
    A total of seven species of the genus Carcharhinus, one species of the genus Prionace, and one species of the genus Galeocerdo, the ribosomal ITS1 region, were ...
  7. [7]
    Evidence of positive selection associated with placental loss in tiger ...
    Jun 14, 2016 · Phylogenetic relationships suggest the lack of placenta in tiger sharks is due to secondary loss. This represents a dramatic shift in ...
  8. [8]
    Older than expected: Teeth reveal the origin of the tiger shark
    Mar 29, 2021 · Tiger shark teeth are known in the fossil record since about 56 million years. Based on these fossil teeth, over 22 extinct tiger shark species have been ...Missing: phylogeny | Show results with:phylogeny
  9. [9]
    Evolution, diversity, and disparity of the tiger shark lineage ...
    Here, we present a revision of the fossil record of Galeocerdo by examining the morphological diversity and disparity of teeth in deep time.
  10. [10]
    Older than expected: Teeth reveal the origin of the tiger shark
    Up to now, it was assumed that the modern tiger shark originated ca. 5.3 million years ago. The team, however, was able to identify several 13.8 million year ...Missing: phylogeny | Show results with:phylogeny<|separator|>
  11. [11]
    (PDF) The evolutionary history of the tiger shark, Galeocerdo cuvier
    Nov 15, 2018 · Over the past two centuries, more than sixty extinct ancestors and relatives of the sole extant tiger shark Galeocerdo cuvier were recorded.
  12. [12]
    Evolution, diversity, and disparity of the tiger shark lineage ... - PubMed
    Here, we present a revision of the fossil record of Galeocerdo by examining the morphological diversity and disparity of teeth in deep time.Missing: phylogeny | Show results with:phylogeny
  13. [13]
    Galeocerdo cuvier, Tiger shark : fisheries, gamefish - FishBase
    It also feeds on carrion and garbage, including cans, pieces of metal and burlap bags (Ref. 26938). Second only to Carcharodon carcharias in recorded attacks on ...
  14. [14]
    Growth and Maximum Size of Tiger Sharks (Galeocerdo cuvier) in ...
    Jan 8, 2014 · Tiger shark maximum size is typically between 380 & 450 cm Total Length (TL), with a few individuals reaching 550 cm TL, but the maximum size ...
  15. [15]
    Tiger Shark - FWC
    Maximum size about 18 feet in length and a weight of 2000 pounds. Matures at approximately 7-10 years of age (about 10 feet) and is estimated to live 16+ years.
  16. [16]
    Galeocerdo cuvier, Tiger shark : fisheries, gamefish - FishBase
    Body shape (shape guide): fusiform / normal; Cross section: angular. Biology Glossary (e.g. epibenthic). Usually found near surface to depths of 140 m (Ref ...
  17. [17]
    Sharks & Rays - Physical Characteristics | United Parks & Resorts
    Body Shape. Sharks typically have a fusiform body (rounded and tapered at both ends). This shape reduces drag and requires a minimum amount of energy to swim.
  18. [18]
    CREATURE FEATURE: Tiger Shark
    Sep 2, 2020 · The largest on record was over 5m long and weighed ~635kg. With a powerful torpedo-shaped body, they have a short, rounded snout and large eyes.Missing: structure | Show results with:structure
  19. [19]
    Tiger shark • Galeocerdo cuvier • Fish sheet - Fishipedia
    Unlike most sharks, which have a pointed snout, its snout is short and flat. This species has a sleek body, with a gray back and darker stripes, and a white ...
  20. [20]
    https://underwaterspotter.com/blogs/species-spotlight/tiger-shark
  21. [21]
    Ontogeny of head and caudal fin shape of an apex marine predator
    Feb 11, 2016 · Ontogeny of head and caudal fin shape of an apex marine predator: The tiger shark (Galeocerdo cuvier) ... body shape as tiger sharks mature.Introduction · Capturing Sharks · Results<|control11|><|separator|>
  22. [22]
    Ontogeny of head and caudal fin shape of an apex marine predator
    Tiger sharks (Galeocerdo cuvier) are an apex predator in tropical seas, and, as adults, are highly migratory. However, little is known about ontogenetic changes ...
  23. [23]
    Shark Anatomy
    Nov 5, 2018 · Shark skeletons are made of cartilage. This is strong and durable, yet much more flexible and lighter than bone. Being lighter helps a shark to stay afloat.
  24. [24]
    Tiger Shark Teeth and Anatomy - Animals | HowStuffWorks
    Apr 28, 2008 · The dorsal fins on top help the tiger shark change directions. Like other shark species, they also have vibration detectors along their sides ...
  25. [25]
    Ask an Expert: The Superpowers of Shark Skin | South Carolina ...
    Aug 22, 2022 · Shark skin is covered by a layer of dermal denticles, otherwise known as placoid scales, that are made of the same material as human and stingray teeth.
  26. [26]
    Why Tiger Sharks' Skin Feels Like Sandpaper - One Ocean Diving
    Sep 10, 2025 · Each denticle is shaped like a miniature tooth, with ridges that reduce drag and turbulence as the shark swims.
  27. [27]
    Heterodonty and ontogenetic shift dynamics in the dentition of ... - NIH
    Apr 15, 2022 · Teeth of Galeocerdo cuvier are asymmetrical as the crown is compressed and distally inclined. The mesial cutting edge is curved, whereas the ...
  28. [28]
    Tiger Shark Tooth Shape & Diet - Elasmo-research.org
    The Tiger Shark's characteristic tooth shape (each featuring a deep primary notch, with large serial cusplets along the distal edge of the serrated blade) is ' ...
  29. [29]
    Heterodonty and ontogenetic shift dynamics in the dentition of the ...
    Apr 15, 2022 · Here, we use landmark-based 2D geometric morphometrics on teeth of the tiger shark Galeocerdo cuvier to analyse and describe dental ...
  30. [30]
    Tiger Shark Facts and Information - Galeocerdo cuvier and Fossil ...
    This shark had a very different tooth form. They are similar in size to G. aduncus, but have thicker roots. Their crowns are slender and twisted; ideal for a ...Missing: shape | Show results with:shape
  31. [31]
    [PDF] TIGER SHARK
    Young tiger sharks are born with spots, which fuse as they grow into a distinct striping pattern. These sharks also have a distinctly smaller second dorsal fin, ...
  32. [32]
    Shark Senses
    Nov 4, 2018 · ELECTRORECEPTION (ampullae of Lorenzini) ... Sharks have a complex electro-sensory system. Enabled by receptors covering the head and snout area.
  33. [33]
    Hawaiʻi Sharks | Senses - Hawaii.gov
    Sensitive olfactory receptors inside the nasal sac detect smells in extremely small concentrations, and send nerve impulses to the brain. How good is a shark's ...
  34. [34]
    How Far Can Sharks Smell Blood | Field & Stream
    Oct 23, 2023 · Sharks do have an exceptional sense of smell, among their other formidable attributes. But, they cannot detect a drop of your blood from a mile away.
  35. [35]
    (DOC) Biology of the Tiger Shark (Galeocerdo cuvier) - Academia.edu
    The species has exceptional sensory organs, including Ampullae of Lorenzini for detecting electrical fields. This text provides a detailed overview of the ...
  36. [36]
    Prey interactions in tiger sharks: Accounting for visual perception in ...
    Tiger sharks also have retinal specialisations that may aid visual detection of prey at the surface in the form of a horizontal band of high neuronal density in ...Missing: adaptations | Show results with:adaptations
  37. [37]
    It's the eye of the tiger (shark)! Animal-borne cameras reveal how ...
    Jun 7, 2022 · "Tiger sharks have much lower visual acuity than humans and the video cameras. This means the sharks must rely on any form of movement from the ...Missing: adaptations | Show results with:adaptations
  38. [38]
    [PDF] Galeocerdo cuvier - Tiger Shark Scientific name - CSULB
    Tiger sharks are solitary hunters and feed at night. Conservation Status: IUCN Red List: Near Threatened (NT) - Tiger Sharks are threatened by illegal ...Missing: threats | Show results with:threats
  39. [39]
    [PDF] Is the tiger shark Galeocerdo cuvier a coastal species ... - IEO
    The distribution range of G. cuvier in the western Atlantic Ocean comprises coastal and shelf waters from Massachusetts,. U.S.A., to Uruguay, including the Gulf ...
  40. [40]
    [PDF] Distribution of the tiger shark (Galeocerdo cuvier) in the North ...
    Tiger sharks were caught over a wide area from the Grand Banks of. Newfoundland, Canada, south to Bra- zil and from coastal to offshore waters and into the ...
  41. [41]
    Crossing Latitudes—Long-Distance Tracking of an Apex Predator
    Feb 11, 2015 · Tiger sharks spent most of their time in water temperatures between 23°-26°C but experienced temperatures ranging from 6°C to 33°C. One shark ...
  42. [42]
    22 degrees is tiger sharks' Goldilocks temperature - Divernet
    Mar 13, 2018 · Tiger sharks are at their most active and abundant in coastal waters of around 22 degrees C, according to a new study by an international research team.
  43. [43]
    Habitat use and movement patterns of tiger sharks (Galeocerdo ...
    During their time at liberty they transited through temperate, subtropical and tropical waters and spent the majority of time in the upper 50 m of the water ...
  44. [44]
    Habitat geography around Hawaii's oceanic islands influences tiger ...
    Mar 21, 2018 · Movements were primarily oriented to insular shelf habitat (0–200 m depth) in coastal waters, and individual sharks utilized core-structured ...
  45. [45]
    Salinity drives the distribution of a top-order predator, the tiger shark ...
    Mar 25, 2025 · Indeed, tiger sharks are capable of occupying water temperatures ranging from 4 to 33 °C, and have been caught by fisheries in the sub-Arctic ...
  46. [46]
    Movement patterns and habitat use of tiger sharks (Galeocerdo ...
    Jul 15, 2020 · The tiger shark (Galeocerdo cuvier) is a globally distributed, highly mobile species with established coastal and open-ocean movement patterns ...
  47. [47]
    Habitat use and movement patterns of tiger sharks (Galeocerdo ...
    Nov 25, 2020 · Galeocerdo cuvier have a global distribution and utilize both nearshore and offshore habitats (Fitzpatrick et al., 2012; Holmes et al., 2014) in ...Introduction · Material and methods · Results · Discussion
  48. [48]
    Residency and movement patterns of an apex predatory shark ...
    Aug 22, 2017 · Here we evaluated the movement dynamics of a highly migratory apex predatory shark (tiger shark Galeocerdo cuvier) at the Galapagos Marine Reserve (GMR).
  49. [49]
    Long-term movement patterns of tiger sharks Galeocerdo cuvier in ...
    Mark-recapture studies and satellite tagging have shown that some tiger sharks move very long dis- tances (up to 8000 km) including across ocean basins (Kohler ...
  50. [50]
    (PDF) Long-term movement patterns of tiger sharks Galeocerdo ...
    Aug 5, 2025 · A network of acoustic receivers was used to quantify the long-term movements of transmitter-equipped tiger sharks Galeocerdo cuvier Peron & ...
  51. [51]
    Repeated, long-distance migrations by a philopatric predator ...
    Jun 9, 2015 · In this study we use long-term satellite tracking of tiger sharks to determine movement patterns across multiple years, including examination of ...
  52. [52]
    (PDF) Tiger Shark (Galeocerdo cuvier) movement patterns and ...
    Aug 6, 2025 · While the majority of movement activity was focused around continental slope waters, large-scale migration was evident with one individual ...
  53. [53]
    Evidence of Fine‐Scale Genetic Structure in Tiger Sharks ...
    Jun 8, 2025 · Specifically, our results indicate dispersal biases relating to both sex and possibly ontogeny, and the potential for residency and local ...
  54. [54]
    Age-Dependent Dispersal and Relatedness in Tiger Sharks ...
    Jul 17, 2022 · In sharks, genetic studies have shown evidence of widespread male-biased dispersal, though tagging and tracking studies on the same populations ...
  55. [55]
    The importance of remote islands and seamount corridors to adult ...
    Abstract. The movements of tiger sharks (Galeocerdo cuvier) across their global distribution are diverse and complex, and there remains a dearth of information ...
  56. [56]
    Residency, Site Fidelity, and Regional Movement of Tiger Sharks ...
    Relationship between day of year and fork length for tiger sharks, Galeocerdo cuvier, captured near Bimini, The Bahamas. Red circles represent female sharks, ...<|separator|>
  57. [57]
    Tiger shark migrations altered by climate change, new study finds
    Jan 13, 2022 · The locations and timing of tiger shark movement in the western North Atlantic Ocean have changed from rising ocean temperatures.
  58. [58]
    Climate Change Is Shifting Tiger Shark Populations Northward
    Jan 19, 2022 · New NOAA Fisheries study shows that tiger sharks are migrating into northern latitudes earlier and expanding their movements further north due to ocean warming.Missing: studies | Show results with:studies
  59. [59]
    Sharks & Rays - Diet & Eating Habits | United Parks & Resorts
    Tiger sharks have been called "garbage cans of the sea" because they feed opportunistically on both live food and carrion. Prey includes bony fishes, other ...
  60. [60]
    Hawaii Tiger Shark Research
    Tiger sharks are opportunistic predators which consume a diverse array of taxa including fishes, other sharks, shellfish, reptiles, mammals and birds. Their ...
  61. [61]
    Understanding the feeding role of tiger sharks | AIMS
    Oct 27, 2017 · “This means the local environment and prey community appear to be the most important determinants of the diet of tiger sharks.” Dr Ferreira said ...Missing: hunting | Show results with:hunting
  62. [62]
    The trophic role of a large marine predator, the tiger shark ... - Nature
    Aug 9, 2017 · The trophic role of tiger sharks is therefore both context- and habitat-dependent, consistent with a generalist, opportunistic diet at the population level.
  63. [63]
    efficient foraging strategies by tiger sharks - Journals
    Jul 27, 2020 · These sharks are generalist feeders with anatomical specializations for feeding on large prey [3–7]. Although they actively hunt prey, they are ...
  64. [64]
    [PDF] Ontogenetic dietary shifts and feeding behavior of the tiger shark
    Ontogenetic shifts in diet may be attributed to increased size of sharks, expanded range and exploitation of habitats of larger sharks, and/or improved hunting ...
  65. [65]
    Diet and trophic ecology of the tiger shark (Galeocerdo cuvier) from ...
    Jun 8, 2017 · The current study provides information on size-based and sex-specific variations in diet, trophic position (TP) and foraging habitat of tiger sharks.
  66. [66]
    (PDF) Feeding habits of the tiger shark, Galeocerdo cuvier, in the ...
    Aug 10, 2025 · Tiger sharks, Galeocerdo cuvier, are apex predators that may structure marine communities through predation. ... Feeding ecology of t...
  67. [67]
    Tiger Shark | Life in Water Wiki - Fandom
    Hunting Strategy: As apex predators, Tiger Sharks have a varied diet and are known for their opportunistic feeding behavior. They use stealth and their keen ...<|separator|>
  68. [68]
    Sharks rarely seen together may be up for sharing a meal too good ...
    May 29, 2025 · Researchers have described an unusual aggregation of sharks coming together to feed on a carcass that had decayed to mostly flesh and blubber.
  69. [69]
    Ontogenetic dietary shifts and feeding behavior of the tiger shark ...
    Ontogenetic dietary shifts and feeding behavior of the tiger shark, Galeocerdo cuvier, in Hawaiian waters ... opportunistic feeders that prey heavily on abundant, ...
  70. [70]
    Evaluating the landscape of fear between apex predatory sharks ...
    Aug 1, 2015 · To address this knowledge gap, we investigated predator–prey relationships between tiger sharks (Galeocerdo cuvier) and loggerhead turtles ( ...
  71. [71]
    Prey interactions in tiger sharks: Accounting for visual perception in ...
    As such, the predator-prey dynamics between tiger sharks and sea turtles have been the focus of several behavioural studies (Afonso and Hazin, 2015 ...
  72. [72]
    A Comparison of the Seasonal Movements of Tiger Sharks and ...
    Dec 19, 2012 · Predators play important roles in ecosystems by influencing the distribution, behaviour and abundance of their prey and predator-prey ...
  73. [73]
    Tiger Shark Behavior - Epic Diving
    Jul 25, 2023 · They are known to consume a wide range of prey, including fish, sea turtles, seals, dolphins, birds, and even carrion. Bold and Curious: Tiger ...Missing: strategies | Show results with:strategies
  74. [74]
    Behavioural patterns of a Tiger Shark (Galeocerdo cuvier) feeding ...
    Tiger Sharks, Galeocerdo cuvier, are large top-level predators usually solitary as adults. Observation of their scavenging activity on the carcass of a dead ...<|separator|>
  75. [75]
    https://brill.com/view/journals/beh/162/5/article-p331_1.xml?language=en
  76. [76]
    Behavioural patterns of a Tiger Shark (Galeocerdo cuvier) feeding ...
    Aug 6, 2025 · Here, we analyze aggregation behavior for mobulid species, providing consistent definitions for grouping events and summarizing the existing ...
  77. [77]
    Study shows tiger sharks have social preferences for one another
    Sep 3, 2021 · Tiger sharks, often considered a solitary nomadic species, are social creatures, having preferences for one another.
  78. [78]
    Tiger sharks' social bonds 'buffer' impact of feeding dives
    Nov 3, 2021 · A new study has found that tiger sharks (Galeocerdo cuvier), which ordinarily have a reputation as solitary creatures, have active social lives.
  79. [79]
    First insights into social behavioral patterns between pairs of bait ...
    Tiger shark artificial feeding aggregations can drive interactions with conspecifics. In Fuvahmulah Island, Maldives, mature female tiger sharks show pair-wise ...
  80. [80]
    Behavior of Tiger Sharks (Galeocerdo cuvier)
    Sep 25, 2025 · Tiger sharks are highly nomadic and do not defend strict territories in the way some animals do. Tracking studies indicate they have large ...Missing: philopatry | Show results with:philopatry
  81. [81]
    First insights into social behavioral patterns between pairs of bait ...
    May 24, 2025 · Tiger sharks are predominantly known as solitary animals, yet their opportunistic and generalist predatory nature can drive interactions ...
  82. [82]
    Diet and trophic ecology of the tiger shark (Galeocerdo cuvier) from ...
    Jun 8, 2017 · The current study provides information on size-based and sex-specific variations in diet, trophic position (TP) and foraging habitat of tiger sharks.
  83. [83]
    The far-reaching benefits of tiger sharks for climate - BBC
    Oct 7, 2021 · While the presence of tiger sharks is a threat to their prey, these predators are crucial to the health of the marine ecosystem that supports ...
  84. [84]
    Tiger Shark's Vital Role in Our Oceans (Galeocerdo cuvier) |
    Jun 2, 2020 · Tiger sharks, as apex predators, keep the ocean clean by eating the sick and dead, which is vital for a healthy ecosystem.
  85. [85]
    Hawaiʻi Sharks | Mating and Reproduction - Hawaii.gov
    Often, the male must bite the female's back, flanks and fins, sometimes inflicting serious looking wounds, in order to get into a position to mate. For this ...Missing: Galeocerdo cuvier
  86. [86]
    Tiger Shark Courtship Ritual Caught On Tape - Forbes
    Aug 2, 2021 · Two tiger sharks (Galeocerdo cuvier) – one male, one female – began to dance, with the male chasing the female in intricate circles until they finally swam ...
  87. [87]
    Lack of multiple paternity in the oceanodromous tiger shark ...
    Jan 17, 2018 · Tiger sharks are the only carcharhinid with an aplacental viviparous (ovoviviparous) reproductive strategy [15], making them unique within the ...
  88. [88]
    Tiger Shark Fact Sheet | Blog | Nature - PBS
    Apr 12, 2024 · Family: | Galeocerdonidae Genus: | Galeocerdo Species: | G. cuvier. Size and Weight: Tiger sharks are one of the largest shark species. On ...<|control11|><|separator|>
  89. [89]
    [PDF] Updated reproductive parameters for the tiger shark (Galeocerdo ...
    Jun 20, 2023 · Comparison of length measurements of male reproductive organs by stage for tiger sharks (Galeocerdo cuvier) collected in the western North ...
  90. [90]
    Tiger Shark, Galeocerdo cuvier (Péron & Lesueur 1822)
    Galeocerdo cuvier. The IUCN Red List of Threatened Species 2019: e.T39378A2913541. http://dx.doi.org/10.2305/IUCN.UK.2019-1.RLTS.T39378A2913541.en.
  91. [91]
    How Long Are Tiger Sharks in Hawai'i Each Year? - One Ocean Diving
    Jul 21, 2025 · After a gestation period of approximately 15 to 16 months, females give birth to pups primarily in September and October. These newborn sharks ...
  92. [92]
    Captive Birth of Tiger Shark (Galeocerdo cuvier) Reveals a Shift in ...
    Jun 11, 2018 · Parturition events.—The female gave birth to 30 offspring, which included three still births, one individual preyed upon by another species ( ...Missing: process | Show results with:process
  93. [93]
    SHARK REPRODUCTION - Sharks4kids
    Once they are mature, sharks will usually mate in the Spring and Summer. The period of gestation can range from 9 months to 2 years (frilled shark gestation ...<|separator|>
  94. [94]
    A novel mode of embryonic nutrition in the tiger shark, Galeocerdo ...
    Jan 21, 2016 · Length, weight, and volume of eggs, embryos, and postembryonic spiny dogfish (Squalus acanthias) up to 83 cm long were differentially affected ...
  95. [95]
    Galeocerdo cuvier | Shark-References
    Gestation period: 13-16 months. Size at birth between 51 [517] and 104 [544] cm TL; born at about 51-76 cm TL [2539]. Tiger sharks ...
  96. [96]
    [PDF] Tiger shark Species Status Assessment - NY.Gov
    Habitat use and foraging behavior of tiger sharks (Galeocerdo cuvier) in a seagrass ecosystem. Marine Biology 140: 237-248. Knickle, C. 2010. “ ...<|separator|>
  97. [97]
    [PDF] Tiger Shark, Galeocerdo cuvier
    The Tiger Shark has a circumglobal distribution throughout tropical and temperate waters (Compagno. 1984). Within Australia, it is found from Windy Harbour ( ...
  98. [98]
    [PDF] Thirty-five years of tiger shark Galeocerdo cuvier relative abundance ...
    Tiger sharks are known to use shallow water habitats at early life stages and progressively expand to include more pelagic waters as they grow (Afonso & Hazin, ...Missing: preferences | Show results with:preferences
  99. [99]
    Unsustainable exploitation of tiger sharks in the Arabian Sea and ...
    Populations of the iconic tiger shark, Galeocerdo cuvier, are in a state of global decline, with the species assessed as 'Near Threatened' on the IUCN Red List.Missing: threats | Show results with:threats
  100. [100]
    Endangered Species: Tiger Shark - New Tides Conservation
    Mar 9, 2025 · Despite their resilience and adaptability, tiger sharks are currently listed as Near Threatened on the IUCN Red List. This status reflects ...
  101. [101]
    Almost nothing is known about the tiger shark in South Atlantic waters
    Jan 20, 2023 · The tiger shark, Galeocerdo cuvier, is the largest Carcharhinidae member and one of the largest apex marine predators (Meyer et al., 2014). It ...
  102. [102]
    Decline in tiger shark population defies expectations - Phys.org
    Sep 12, 2019 · "Tiger sharks are top predators that have few natural enemies, so the cause of the decline is likely overfishing,"' he said. "This decline is ...
  103. [103]
    Prevalence, persistence and impacts of residual fishing hooks on ...
    Thirty-eight percent of tiger sharks had at least one fisheries interaction resulting in retained hooks during the 8-year observation period.
  104. [104]
    Commercial Atlantic Shark Fishery Statuses, Minimum Sizes, and ...
    Aug 28, 2025 · Retention limits for Atlantic sharks vary by permit type and species complex. This page is kept up to date with changing statuses and retention limits.
  105. [105]
    Shark Management Laws | NOAA Fisheries
    Nov 21, 2024 · The Shark Conservation Act requires that all sharks in the United States, with one exception, be brought to shore with their fins naturally attached.
  106. [106]
    Thirty-five years of tiger shark Galeocerdo cuvier relative abundance ...
    The results of this study provide some optimism that current conservation efforts in The Bahamas have been effective to maintain local tiger shark abundance ...
  107. [107]
    Good fisheries management, if enforced, can help sharks and rays ...
    Feb 3, 2023 · Other shark species have also mounted recoveries following the U.S. management plan, including tiger sharks (Galeocerdo cuvier), scalloped ...
  108. [108]
    [PDF] Evaluating spatial management options for tiger shark (Galeocerdo ...
    Evaluating spatial management options for tiger shark (Galeocerdo cuvier) conservation in US Atlantic Waters. – ICES Journal of Marine Science, doi:10.1093/ ...
  109. [109]
    How Overfishing Is Impacting Tiger Sharks In The Arabian Sea
    Sep 18, 2025 · Over time, this creates a population bottleneck: fewer sharks survive to adulthood, reproduction rates decline, and the overall population ...
  110. [110]
    Conservation Impacts | OCEARCH Shark & Ocean Research
    See OCEARCH's conservation impacts—from DNA tools fighting illegal trade to protecting marine corridors and tracking shifts in shark populations worldwide.
  111. [111]
    10 Most Dangerous Places for Shark Attacks | HowStuffWorks
    Notable dangerous spots include Volusia County, Florida, known as the "Shark Attack Capital of the World," and Recife, Brazil, where a significant proportion ...Hawaii · South Africa · Tiger Shark (142 Known... · Sand Tiger Shark (36 Known...
  112. [112]
    A Biologist Reveals The 10 Shark Species Known To Have Killed ...
    Jun 14, 2024 · Tiger Shark (39 Recorded Unprovoked Fatalities)​​ Their opportunistic diet, which includes a wide array of prey, and their tendency to scavenge, ...
  113. [113]
    International Shark Attack File - Florida Museum of Natural History
    There was an increase in the number of unprovoked shark attacks worldwide and an uptick in fatalities in 2023 compared… Feb 6, 2023. Shark bites tied for 10 ...Yearly Worldwide Shark Attack... · Maps & Data · Attacks & Fatalities · United States
  114. [114]
    Bethany's Story | Bethany Hamilton
    2003. A rising surf competitor, Bethany places second at the NSSA National Championships in July. On October 31, she is bitten by a shark and her left arm is ...
  115. [115]
    Bethany Hamilton Reflects on Losing Arm to Tiger Shark 20 Years ...
    Nov 1, 2023 · Kauai surfer Bethany Hamilton lost her arm to a tiger shark on October 31, 2003.
  116. [116]
    Yearly Worldwide Shark Attack Summary
    Feb 11, 2025 · In 2024, there were 47 unprovoked and 24 provoked shark bites worldwide, with 4 unprovoked fatalities. The US had 28 unprovoked bites, and ...
  117. [117]
    Tiger Shark – FaunaFocus
    Feb 7, 2020 · The tiger shark is commonly caught in artisanal fisheries in the tropics and subtropics, including in Mexico, Panama, Brazil, and a few African ...
  118. [118]
    Squalene and Sharks – Shark Stewards
    Commercially derived from shark liver, squalene/squalane is found in cosmetic products including sunscreens, anti-aging creams, lotions, hair conditioners, ...
  119. [119]
    Temporal and Spatial Distribution of Catches of Tiger Sharks ...
    Temporal and Spatial Distribution of Catches of Tiger Sharks, Galeocerdo cuvier, in the Pelagic Longline Fishery Around the Hawaiian Islands ... exploitation, and ...
  120. [120]
    [PDF] Tiger Shark, Galeocerdo cuvier
    Mar 1, 2019 · It is thought to reproduce only every three years which reduces its capacity to recover from exploitation. Declines in Tiger Shark catch rates ...Missing: statistics | Show results with:statistics<|separator|>
  121. [121]
    [PDF] Unsustainable exploitation of tiger sharks in the Arabian Sea and ...
    Mar 1, 2025 · Estimates of fishing mortality (F = 0.77) and exploitation rate (E = 0.71) suggest that. G. cuvier face high levels of fishing pressure. The ...Missing: statistics | Show results with:statistics
  122. [122]
    Hawaii's Spiritual Connection to the Shark
    Sharks play an important role in art, legends, and even spiritual beliefs. Throughout Hawaiian folklore, stories, legends and myths feature sharks as deities.
  123. [123]
    The Cultural Significance of Sharks in Hawaii - Hawaii Travel Guide
    Some species of sharks, like the Tiger shark, hold special status as 'aumakua, or family guardians, in Hawaiian culture. Shark 'aumākua stands out with its ...
  124. [124]
    Sharks as 'aumakua
    Jan 14, 2001 · In Hawaiian, 'aumakua is defined as a benevolent guardian spirit or family protector. Though some view the practice as a religious one involving worship.
  125. [125]
    The cultural significance of sharks in Hawaii
    Jul 10, 2015 · ... shark that is considered a guardian. “Some of my family members believe our aumakua is a tiger shark, and not all sharks are aumakua either.
  126. [126]
    Australia's ancient language shaped by sharks - BBC
    Apr 30, 2018 · The Aboriginal Yanyuwa people believe Australia's Gulf of Carpentaria was created by the tiger shark.
  127. [127]
    [PDF] The cultural significance of sharks and rays in Aboriginal societies ...
    Sharks and rays symbolize connection to land and sea, provide food, and are linked to ancestors in Aboriginal cultures. They are also valued as food and raw ...
  128. [128]
    The Shark in Nyungar Culture - Anthropology from the Shed
    In Nyungar culture, sharks symbolized bravery, were seen as spirits, and had spiritual significance. They were also associated with shamans and a "magic stone".<|control11|><|separator|>
  129. [129]
    The Cultural Significance of Sharks in Fijian Lore - Coral Coast Divers
    Jun 3, 2024 · Sharks are often depicted as powerful and mystical beings in Fijian mythology. They are seen as protectors, ancestors, and deities, embodying the spirit of the ...Missing: folklore | Show results with:folklore
  130. [130]
    Before sharks became movie villains, they were celebrated in myths ...
    Jul 26, 2017 · Sharks have been part of the folklore for centuries. “No other animal elicits such fascination and fear as the shark,” writes Dean Crawford in Shark.Missing: significance | Show results with:significance