Although they could live on dry land, Paracyclotosaurus probably spent most of its time in water. They had flattened bodies and elongated heads, almost 60 centimeters (2 ft) long, that vaguely resembled those of modern crocodiles. A fish-eater, it might have lain in wait for prey, just below the surface of the water. When an unsuspecting fish came within reach of its jaws, Paracyclotosaurus lifted its massive head, its mouth opened wide and the fish was sucked inside. Modern predators, such as crocodiles, use this technique to catch some of their prey.