When we think of the giant amphibians of the late Palaeozoic, it is usually Eryops that comes to mind. At home in the water as on the land, this was one of the biggest vertebrates of irs time, preying on fish, small reptiles and amphibians which it probably hunted in the water. Teeth on the palate suggest that once it caught its prey it would swallow it by throwing its head upwards and backwards, just as crocodiles and alligators do today.(walking dinosaur costume)
Features：fryops has a stout body, supported by a strong spine with very wide ribs, four short and strong legs and a short tail It has a big head with broad jaws armed with strong teeth, showing the folded enamel pattern of the typical labyrinthodont. The eyes are on the top of the skull, suggesting that it could lie in wait in the water with only its eyes showing, much like a modern alligator. It would have breathed by expanding the area inside its mouth and pumping air to the lungs using its throat muscles.
The crocodile-like long-hodied swimming hunters, characterized by Archegosaurus of the Carboniferous, continued into the Permian. Bageherpeton was typical, living in lakes and desert streams and feeding on fish, and other small vertebrates, as well as the many invertebrates that were present. The archegosaurs were first studied in Europe, but the discovery of Bageherpeton in South America shows that they were much more widespread.
Features:The notable features of this animal are the long narrow jaws. Long jaws and sharp teeth like this evolved several times in different amphibian lineages, and were evidently an adaptation for catching fish. The lower jaw is strengthened on the inside and this is interpreted as a reinforcement for the powerful jaw action that would crush a fish as soon as it was caught. The presence of fish scales in the same rock as the skull of Bageherpeton indicates that it lived among fish in shallow water.