Dakosaurus was a Metriorhynchidae from the late Jurassic and early Cretaceous period. It was a top predator of the oceans around the time. It had a salt gland that allow it to main salt in its body when it drinks seawater. When hunting it would twist feed that means it is able tear hunks of flesh while eating. It looked like a crocodile but it acted more like a Killer Whale. So it may travel in packs that hunted other large game.