Metriorhynchus is a genus of marine crocodilians. specifically "thalattosuchians", that lived during the Jurassic Period, 167 to 155 million years ago.

In The Land Before Time

It was seen in the beginning of the first movie, chasing a small amphibian and attempting to eat it, but fails and swims away. The Metriorhynchus depicted heavily resembles a fish; in reality, thalattosuchians resembled crocodiles but with a fish-like tail and fins. It was the first Belly Dragger seen, however, it is the only fully aquatic one.




  1. Meyer H von 1832. Paleologica zur Geschichte der Erde. Franfurt am Main, 560 pp.