Top 10 Incredible Prehistoric Sea Monsters

WatchMojo - Friday, 21 April 2017
There were many deadly predators beneath the waves during prehistoric times. Between a razor-toothed monster called Predator X, a prehistoric shark called Cretoxyrhina and the giant Shastasaurus, these were deadly sea creatures from the time of the dinosaurs. WatchMojo counts down ten sea monsters so scary you won’t BELIEVE they once existed.

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