Researchers traveling along the Kuril–Kamchatka and Aleutian trenches in the northwest Pacific Ocean used a submersible to ...

BUENOS AIRES, Argentina -- Transparent-faced fish drift through dusky waters. Snowlike flecks of dead plants sift down from ...

Creatures such as these sea urchins serve as deep-sea recyclers that break down bits of dead plants and animals that settle on the seafloor and make nutrients available to other organisms.

The Titanic lies about 12,500 feet under the ocean. The pressure down there is so immense that even submersibles supposedly built for those conditions can, as we know, tragically fail. Now imagine ...

Sea stars may look like they're cuddling, but these underwater gatherings serve surprising survival and reproductive purposes ...

After securing more samples, the team confirmed a long-held hypothesis. Unlike other spiders — both deep sea and on land — these new species of Sericosura were physiologically unique.

The giant-tentacled monster of the sea, thought to be a sea anemone, is actually an impostor that belongs to a new order of animals, according to scientists at the American Museum of Natural History.

Meet the 'sea moth,' a three-eyed sea creature from 500 million years ago The Mosura fentoni, or "sea moth," may have used its third, median eye to detect light and move around its environment.

Other Glaucus Atlanticus Behaviors This blue sea creature, despite its small size, is rather aggressive by nature. If you encounter one of these washed up on the beach, avoid it.

The discovery challenges "long-standing assumptions about life's potential at extreme depths," study authors said.