The sand tiger shark (Carcharias taurus) is also known as the grey nurse shark, but looks very different from the other "typical" nurse sharks.
These sharks won't take your temperature or apply a band-aid to your boo-boos. The origin of their common name is highly debated: it may be from the sucking sound they make when seeking out prey (nursing baby), from an archaic word, nusse, meaning 'cat shark,' or from the Old English word for sea-floor shark, hurse.
They are gray-brown and have a tail that can be up to one-fourth their total length. They have beady little eyes and when younger, they are covered in spots! These sharks, unlike many, are smooth to the touch, as well.
Tangent: When I worked at BBFS, a smaller nurse shark chomped on a bigger nurse shark's dorsal fin.... and did not let go for a few HOURS. And guess who's job it was to observe the little sharks until they decided to play nice...
These jaws are usually used to crush and eat shellfish and sometimes coral, but they fancy fish, shrimp, and squid. They also like crustaceans, molluscs, tunicates, sea snakes and stringrays as well. To hunt for these critters, they're usually found in the tropical and sub-tropical western Atlantic and eastern Pacific oceans. Usually found in shallower waters, you can find them up to depths at up to 75 m (246 ft). They usually frequent mangrove estuaries, sand flats and coral reefs. During the day they are pretty lazy, piling on top of each other and resting (they have the ability to pump water through their mouths and out their gills). However, at night, it's every shark for itself and they become solitary, active hunters.
As of right now, there isn't a fishery for these animals, and they are listed as "Data Deficient" by the IUCN, and no conservation methods are set for these sharks.