A recent Schmidt Ocean Institute expedition off the coast of Uruguay discovered at least 30 suspected new species and explored a sunken warship.

Photos taken by blackwater divers offered a new glimpse into the early life stages of marine fishes and their interactions ...

In the deepest and coldest parts of the ocean, sea creatures — mainly invertebrates, or animals without backbones — can reach gargantuan proportions. Squids, sea spiders, worms and a variety of other ...

Thousands of meters below the ocean's surface lurk some gigantic creatures, much larger than their shallow-water brethren. Scientists have a few hunches for why this happens, but the debate continues.

An underwater voyage has revealed a network of creatures thriving at the bottom of deep-sea ocean trenches, researchers said in a newly published paper. The deep-sea trenches, also called Hadal ...

More than 5,000 animal species previously unknown to science live in a pristine part of the deep sea. Their home — called the Clarion-Clipperton Zone — sits in the central and eastern Pacific Ocean ...