Far below the ocean’s surface, where sunlight disappears and pressure reaches crushing levels, some of the planet’s strangest ...

This article originally published at 'Mass die off': Thousands of rare sea creatures wash up on Texas coast.

Along long stretches of the Texas shoreline, thousands of rare sea creatures have been turning up dead or dying, transforming ...

Like a scene out of a Jules Verne novel, scientists from Schmidt Ocean Institute recently encountered a giant phantom jelly ...

Volunteers found 23 baby sea turtles killed on a North Florida beach, and evidence indicates the killer was someone’s unleashed pet, Atlantic Beach officials say. NPS photo Newly hatched sea turtles ...

A “rare” True’s beaked whale recently washed ashore in Ireland in what experts say is part of a cluster of strandings. Photo from Milomc123, UnSplash Two rare deep-sea whales recently washed up on ...

Boaters recently spotted a group of Risso’s dolphins off the coast of South Africa — a “rare” sight for the area, according to a local tour company. Photo from Doug Bagg, UnSplash Boaters off the ...

A manatee was one of the latest in a long line of rare marine animals to turn heads along the Texas coast last month, and — in this case — hold up a $64 million state construction project. One of the ...

While fishing off the coast of Thailand, a group of fishermen noticed a massive underwater shadow approaching their boat. It turned out to be a rare sighting of an at-risk sea creature. Several ...

A mysterious group of deep-sea whales was just spotted near a remote archipelago in the Atlantic Ocean — for the first time in years. The marine creatures — Gervais’ beaked whales — were seen off the ...