Diet: Baryonyx was a large predator that ate fish and other dinosaurs. A fossilized Baryonyx was found with a fossilized meal in its stomach; this stomach contained fish scales, fish bones, and plant-eating dinosaur bones (from Iguanodon). So far, Baryonyx is the only known dinosaur that ate fish. It may have waded in rivers and shallow seas to catch fish (just as some modern-day bears do).

Anatomy: Baryonyx was about 32 feet (9.5 m) long and weighed about 2 tons. This theropod dinosaur had a long, alligator-like head and 96 thin, sharp, serrated teeth.

When it Lived: Baryonyx lived during the early Cretaceous period, about 125 million years ago.

Fossils: Baryonyx fossils were found in England. Baryonyx was found 30 miles south of London in 1983. It was named in 1986 by British paleontologists Angela C. Milner and Alan J. Charig.