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Top 10 Incredible Prehistoric Sea Monsters // Subscribe: // TIMESTAMPS BELOW ———————– CELEBRATE 10 YEARS OF WATCHMOJO WITH OUR SPECIAL EDITION MAGAZINE, LINKS BELOW!

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.

If you want more weird water lists, be sure to check out our list of the Top 10 Scariest Fish: , Top 10 Weirdest Prehistoric Creatures: and Top 10 Coolest Prehistoric Animals: .

00:34 #10: Elasmosaurus
01:21 #9: Dakosaurus
01:56 #8: Cretoxyrhina
02:47 #7: Shastasaurus
03:27 #6: Basilosaurus
04:15 #5: Tylosaurus
05:08 #4: Pliosaurus Funkei [aka Predator X]
06:16 #3, #2 & #1 ???

Special thanks to our users ibriers 1, MikeMJPMUNCH and Joao S for suggesting this idea! Check out the voting page at

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