"Eryops" averaged a little over 1.5-2.0 meters (5–6.5 ft) long, so it was one of the largest land animals of its time. It weighed about 90 kilograms (200 lb). It probably had few predators, although the apex predator of the time was the synapsid "Dimetrodon", which was even larger. Several complete skeletons of "Eryops" have been found in the Lower Permian, but skull bones and teeth are the most common fossils.