A large skull of the animal was found in southern Argentina in an area that was once part of the Pacific Ocean.

Named Dakosaurus andiniensis, the creature is an entirely new species of ancient crocodile. It had a head like a carnivorous dinosaur and a tail like a fish. With its massive jaws and serrated teeth, it preyed on other marine reptiles.

Totally unique among marine crocodiles, “it is one of the most evolved members of the crocodilian family and also one of the most bizarre,”