Researchers urge stronger protections like fishing limits and habitat conservation to prevent further decline in shark ...

Though more than 70 shark species are in worse shape than tiger ... shark and feeding off scraps of its prey and parasites on its skin. Jaws isn't responsible for most of the threats tiger sharks ...

Like dimples on a golf ball, this shark has specially textured skin that helps reduce drag even further than normal shark skin, making it go even faster. Being warm blooded, or endothermic ...