Two 325-million-year-old ctenacanth shark fossils discovered in Mammoth Cave shed light on ancient marine ecosystems.

Fascination with Prehistoric Life Beyond scientific circles, this sea monster dinosaur skull has captured public interest, ...

"This is a true, true sea monster," said James Starnes Mississippi ... This is bigger than most dinosaurs walking around on land." Mosasaurs were marine reptiles; lizards that adapted to swimming ...

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Maybe so: The greatest sea monster of the Devonian Period (Dunkleosteus ... But in nearly 150 years of research since fossilized remains of the prehistoric big fish were discovered on the shores ...

From a sea monster's head being on the wrong end of its body to thinking pterosaurs were flying marsupials, here are 10 creatures from the dinosaur age that looked way different than scientists ...

A brand new species of enormous sea creature from the Cretaceous era ... Mosasaurs weren't dinosaurs, instead were huge lizards, distantly related to modern-day iguanas. They were apex predators ...

London — The skull of an enormous ancient sea monster called a pliosaur has been pulled from cliffs on the U.K.'s southern Jurassic Coast. The pliosaur was a marine reptile that lived around 150 ...

Prehistoric bugs? Really? Nah. I’ll stick to this beautifully animated, epic fantasy sea battle. Congratulations to The Sea Beast for pulling off the most epic monster fight of the year.