Cretaceous

Cretaceous is a Purple and Indigo Itchyosaurus and is one of the main villains in Ice Age 2.

In Ice Age 2 he is freed from the ice along with Maelstrom. During the Flood Cretaceous and Maelstrom get swept away along with the flood.

In Ice Age 5 Cretaceous has joined Captain Gutt's brothers Marco and Nak. After Herd vs Pirates 2 Cretaceous receives change of heart and joins the herd.