When Cryptoclidus Lived: Cryptoclidus lived during the late Jurassic period, roughly 165 to 150 million years ago.

Diet: Small fish, squid, and crustaceans (like shrimp) were probably the mainstay of Cryptoclidus' diet. It caught prey with its 100 or so long, pointed teeth.

Fossils: Fossils have been found in England, France, and possibly South America.

Classification: Class Reptilia (reptiles), Order Plesiosauria (plesiosaurs), Superfamily Plesiosauroidea, Family Cryptoclididae, Genus Cryptoclidus.