Sand Tiger Shark

The Sand Tiger Shark is a large, heavy-bodied shark in the family Odontaspididae, found in coastal temperate and subtropical waters across much of the world, though notably absent from the eastern Pacific. Despite its fearsome appearance, with rows of protruding needle-like teeth visible even when its mouth is closed, it is a generally docile, slow-moving species. It is unique among sharks as the only species known to gulp air at the surface and hold it in its stomach to help control buoyancy, allowing it to hover motionless near wrecks and reef structure. Its reproductive strategy, involving intrauterine cannibalism among embryos, results in very low reproductive output, making populations especially vulnerable to decline.

• Body: bulky, heavy-set, and robust compared to most requiem-like sharks
• Color: gray-brown with scattered rusty or reddish-brown spots, especially on the rear half of the body
• Teeth: long, narrow, needle-like teeth that protrude even with the mouth closed — a key identifying feature
• Fins: two dorsal fins of similar size, both set well back on the body
• Size: typically 2.2-3.2 m
• Look-alikes: Bull Sharks have a much stockier snout and flat, triangular teeth rather than needle-like teeth

Sand Tiger Sharks inhabit shallow to moderately deep coastal waters in temperate and subtropical regions of the western Atlantic, Mediterranean, South Africa, and Australia, though they are absent from the eastern Pacific. They are commonly found around sandy-bottomed surf zones, rocky reefs, and especially shipwrecks, which provide sheltered resting sites. They typically occupy depths from the shallow surf zone down to around 190 m, with seasonal movements between shallow nursery and mating areas and deeper offshore waters. Their strong association with wreck and reef structure makes them a frequently encountered species by divers in areas where they occur.

Sand Tiger Sharks are generally slow-moving and docile, often seen hovering nearly motionless in open water near wrecks or reef caves using their unique ability to gulp and hold air for buoyancy control. They typically form loose aggregations at favored sites, especially around structure, and undertake seasonal migrations between mating, gestation, and pupping areas. Their reproductive biology is unusual: developing embryos practice intrauterine cannibalism, with the strongest embryo in each uterus consuming its siblings, resulting in only one or two pups born per litter after a long gestation. This extremely low reproductive rate makes Sand Tiger Shark populations especially slow to recover from decline.