Deep underwater off the coast of Japan, a sea creature with hundreds of tentacles swayed in the current. Unbeknownst to the rust-colored animal, it was about to be discovered as a new species.

The ocean covers more than 70 percent of Earth’s surface, yet we’ve explored less of it than we have the surface of the moon.

Scuba divers strapped on their gear and plunged into the darkened water off the coast of Florida. Equipped with flashlights, the divers searched the depths and found a “large” sea creature with ...

Thousands of sea cucumbers blanket over two miles of the Seaside, Oregon, beach in a rare natural phenomenon. The translucent ...

Scientists found a pink deep-sea creature with 10 tentacles off the coast of Canada and discovered a new species, a study said. Photo from Marcos Paulo Prado via Unsplash From aboard a research vessel ...

Thousands of feet deep in the South Pacific Ocean, a pair of scientists piloted a submersible through the dark waters and scanned the seafloor. Some pale creatures with dozens of tentacles caught ...

Beauty may be in the eye of the beholder, but some sea creatures have it more difficult than others. Check out our list of ugly sea creatures.