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The 10 Deadliest Marine Reptiles

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10 Undersea Predators That Made the Great White Shark Seem Like a Guppy
cryptoclidus

Cryptoclidus (Hunterian Museum)

Today, the most dangerous creatures in the sea are sharks, along with the occasional whale or fish--but that wasn't the case tens of millions of years ago, when oceans and rivers worldwide were dominated by pliosaurs, ichthyosaurs, mosasaurs, and the occasional snake, turtle and crocodile. On this list, you'll meet some marine reptiles that could practically swallow a great white shark whole--and other, more petite predators that made hungry piranhas seem like pesky mosquitoes by comparison.

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