Dinosaur Provincial Park preserves an extraordinarily diverse group of freshwater vertebrates. Fish include sharks, rays, paddlefish, bowfins, gars, and teleosts. Amphibians include frogs, salamanders, and extinct albanerpetontids. Reptiles include lizards (such as the large monitor "Paleosaniwa"), a wide range of turtles, crocodilians, and the fish-eating "Champsosaurus". Mammals such as shrews, marsupials, and squirrel-like rodents are also there, although usually only noticed by their fossilized teeth, rather than bones.