Metoposaurus is an extinct genus of temnospondyl amphibian, known from the Late Triassic of Europe and North America. This mostly aquatic animal possessed small, weak limbs, had sharp teeth and a large flat head. The main diet of this highly flattened creature was fish which it captured with its wide jaws lined with needle teeth. Metoposaurus was up to 3 m (10 feet) long, weighed 454 kg (1,000 pounds), and was one of the last large amphibians. Still, the much larger Koolasuchus survived far into the Cretaceous. A lot of Metoposaurus mass graves have been found, probably from creatures that grouped together in drying pools during drought.