If Prehistoric Beasts Were Here Today: Hunters of the Deep

Mighty marine beasts patrolled the prehistoric seas, dominating other species by sheer size and ferocity. Now Imagine them bursting out of the waves in our own oceans! Meet the giant nautiloid Cameroceras, with its dozens of deadly tentacles; 16-metre Megalodon, the biggest shark ever; and the enormous reptile Elasmosaurus, whose neck stretched out 7 metres.