Cimolichthys is a genus of predatory fish from the Cretaceous of North America and Europe. Despite being a close relative of the modern day lizardfish and lancetfish, it would have looked more like a modern day pike. Its jaw was lined with several sharp teeth, which it used to catch its prey.
In The Land Before Time
A Cimolichthys briefly appears in The Land Before Time V: The Mysterious Island during the scene where the Gang of Five are trying to escape from the island using a log as a boat. During this scene, a Cimolichthys jumps out of the water twice in an attempt to attack Ducky, but misses both times.