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Temporal range: Upper Cretaceous
|Libonectes morgani from the Late Cretaceous of Texas|
Libonectes was a plesiosaur related to Elasmosaurus. It lived 80 to 65 million years ago. It grew up to 12 metres long. It was a predator of small fish; the fish ate plankton in the upper pelagic layers of the sea.