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Elasmosaurus was a large marine reptile that lived during the Late Cretaceous (about 80 million years ago) in a shallow sea that once covered what ...

The coelacanth is the common name of a large marine fish that is found today near the Comoro Islands off the east coast of Africa. It belongs to an...

Kronosaurus belongs to a marine reptile group called pliosaurs. This toothy predator cruised the oceans during the early Cretaceous, about 120 mill...

Dunkleosteus was a huge (about 20 feet long and about one ton in weight) carnivorous fish that lived during the Devonian Period (380-360 million ye...

Though it was quite dolphin-like in appearance, the Ichthyosaurus is actually a marine reptile, living in the Late Triassic to Early Jurassic Perio...