Between 66 million and 215 million years ago, long-necked reptiles called plesiosaurs inhabited the world’s oceans. By ...

This is only the second time the species has been recorded while alive. “I thought it was A.I.,” says fish biologist Kory Evans.

For the first time, scientists have completed an in-depth analysis of fossilized soft tissues from a plesiosaur ...

Humpback anglerfish typically are found at depths of up to 1,500 meters below the water's surface, where there is little to no sunlight.

Why it's awesome: Earth's oceans are home to many secretive and unusual creatures that humans rarely see — including giant phantom jellies. These elusive deep-sea creatures have a 3.3-foot-wide (1 ...

With serpentine necks, flippers and a mouth full of needle-sharp teeth, plesiosaurs have captured imaginations since ...

Scientists confirm that orcas and dolphins have lost the ability to return to dry land due to irreversible evolutionary ...

Overall, 18 species had populations that were either rising — including the giant sea bass, green sea turtle, and southern ...