Cretaceous, a Ichthyosaurus, and Maelstrom, a Globidens, are the two main antagonists of Ice Age: The Meltdown. They were sea creatures who were stuck in the ice. When the ice was melting those 2 creatures were released! When the dam broke they went to kill The Herd! eventually Cretaceous and Malestrom ended up been hit by a boulder. BUT they go out of the way just before the boulder hit the ground and got washed away with the water when the flood got diverted!
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