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

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

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

The ocean is home to some of the most mysterious creatures on Earth. Many of us are familiar with the common sea animals like dolphins, sharks, and turtles, but there are also rare and unusual ...

When Ted Judah goes scuba diving off the coast in Monterey Bay, he normally swims at the surface to the area above the dive ...

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 ...

Wondering about the world's weirdest sea creatures? We've compiled this list of the 20 weirdest animals in the ocean to show ...

The use of cameras by wildlife authorities is one of the best ways to document wildlife sightings, particularly of rarely ...

Scientists on California's Central Coast recently spotted a giant, evasive seven-arm octopus while on a research expedition in Monterey Bay. The rare creature, called Haliphron atlanticus, was seen by ...

Spurilla neapolitana was spotted in the United Kingdom waters for the first time. (Charlotte Cumming via SWNS) By Lauren Beavis A "groundbreaking" sea slug discovery has been made - in a UK first. The ...

Two sea creatures were spotted bonding off the coast of California, a whale watching group said. Getty Images/iStockphoto Two massive sea creatures were spotted being “affectionate” during a “rare” ...