All of today’s crocs look more or less the same. Alligators, gharials, crocodiles, and their cousins are all armored ambush predators that spend much of their time lurking in rivers and swamps. But the greater group to which they belong—the crocodylomorphs—evolved in dramatically-different ways. There were dinosaur-hunters, short-skulled herbivores, and marine hypercarnivores, just to name a few, within the group’s prehistoric ranks. If you’re looking for inspiration for a monster or fearsome creature from another world, prehistory’s crocs can be excellent muses.