Eryops megacephalus is a genus of extinct, semi-aquatic carnivorous amphibian from Lower Permian ( 295 m.y.a.). Fossils are found in Texas, New Mexico and parts of the eastern United States. The animal was about 1.5 – 2.0 meters (5-6 ft) long. It ate possibly anything it could catch.
Eryops used stealth for hunting, much like a modern crocodile, and sat quietly in the water waiting for prey with only its eyes and nostrils visible above the water.