Tiger shark (Galeocerdo cuvier): overview, biology, and human interactions

Identification and characteristics

Tiger sharks are among the larger species of sharks, with adults commonly reaching several metres in length and some specimens reported at sizes approaching five metres. Their body is stout with a blunt snout and powerful jaws lined with large, serrated teeth adapted for cutting through tough material. Young tiger sharks display dark vertical bars or stripes across their sides, a pattern that fades as individuals mature and lends the species its common name.

Distribution and habitat

These sharks occur throughout tropical and warm-temperate seas around the world, favoring coastal areas such as bays, estuaries, and coral reef edges, though they are capable of greater depth excursions. They are found across the Atlantic, Pacific and Indian Oceans but are generally absent from enclosed basins such as the Mediterranean Sea. Individuals have been recorded diving to significant depths, demonstrating ecological flexibility between nearshore and offshore environments.

Diet and behavior

Tiger sharks are generalist predators and scavengers that consume a wide range of prey. Their diet typically includes:

• rays and other cartilaginous fishes
• squid and large cephalopods
• crustaceans and benthic invertebrates
• various bony fishes, including reef and pelagic species
• seals, sea birds and occasionally other marine mammals such as dolphins

They often hunt at night and will scavenge carrion, swallowed fishing gear and discarded refuse. Their feeding flexibility helps them exploit a broad range of habitats and seasonal food availability.

Reproduction and lifecycle

Tiger sharks are ovoviviparous: embryos develop inside eggs retained within the female’s body and are born as live young. Litter sizes are relatively large compared with many other sharks, typically numbering in the tens of pups per birth. Juveniles grow quickly and use coastal nursery areas where their distinctive markings provide camouflage. Sexual maturity is reached several years after birth, and adults continue the wide-ranging habits that characterize the species.

Human interactions and conservation

Tiger sharks are among the species most often implicated in unprovoked shark bites, largely because of their coastal habits and varied diet, but they do not target humans as preferred prey. They are also subject to fishing pressure—targeted and bycatch—and face threats from habitat loss and pollution. Conservation assessments vary by region; many populations are of concern and protected in some waters. For more detailed species information and regional status reports see sources on the species (Galeocerdo cuvier), family (requiem sharks), and general shark conservation resources (Mediterranean absence and regional notes).

Notable facts

• Common name derived from the juvenile striping pattern that resembles a tiger’s coat.
• Often called an ecological generalist because of its wide-ranging diet and habitat tolerance.
• Because of its size and gape, it can consume unusually large and varied items compared with many other coastal sharks.

For further reading consult specialist resources and regional field guides on shark biology, fisheries interactions and conservation management strategies. Additional details and visual identification aids can be found in dedicated species pages and marine reference works (shark overviews, genus information, dietary studies).