Glittery sea worms and sea squirts fit for "The Lord of the Rings" universe might sound like pure fantasy, but they're very real creatures living in the deep sea. Some of these otherworldly ocean ...

High pressure in the deep ocean may squeeze nutrients from sinking “marine snow,” feeding deep-sea microbes and altering how ...

A cnidarian is attached to a dead sponge stalk on a manganese nodule in the Clarion-Clipperton Zone. Diva Amon and Craig Smith, University of Hawaii at Mānoa Picture an ocean world so deep and dark it ...

This octopus can brood its eggs for nearly four years without eating. Here’s how this biological extreme has reshaped how ...

Somewhere in the North Atlantic, more than a kilometer beneath its surface, a cold-water coral reef stretches across an ...

NEW YORK (AP) — An underwater voyage has revealed a network of creatures thriving at the bottom of deep-sea ocean trenches. In these extreme environments, the crushing pressure, scant food and lack of ...

Researchers at MBARI, the Monterey Bay Aquarium Research Institute, have been exploring this hidden world for years. Using ...

Deep down in the sea, where no light penetrates and where the availability of food is very low, life somehow exists in ways ...

Ancient microbial activity preserved in wrinkled seafloor sediments challenges assumptions about where traces of early life can survive.

Scientists have discovered a massive deep-sea coral reef system off the coast of Argentina that may be one of the largest on ...

Researchers say the polymetallic nodules that mining companies hope to harvest from the deep-ocean seafloor may be a source of oxygen for the animals, plants and bacteria that live there. This ...

With growing interest in mining critical metals from the seafloor, countries are now negotiating international rules. The ...