Jurassic Shark

The oceans of the Jurassic world were filled with nightmarish creatures. Plesiosaurs, long-necked reptiles measuring up to twenty-five feet long, ate fish—and each other. The 40-foot-long Kronosaurus and the 45-foot-long Liopleurodon were ferocious predators with razor-sharp teeth. They ate anything they could catch.

Alongside these megapredators swam Hybodus, whose descendants include the great white sharks of today. Hybodus was not the largest hunter in the Jurassic seas, but it was fearle...