The ocean is deep, dark, cold and full of mysteries — and in its deepest regions, animals grow to astonishing sizes. From isopods the size of cats to squids that could square off with a school bus, ...

A deep-sea expedition off Argentina's coast has revealed a surprisingly rich marine ecosystem, including a giant phantom ...

Dive into the depths of the ocean to discover seven rare deep-sea creatures so strange and elusive, you won't believe they exist.

Scientists have recorded footage of a large phantom jellyfish off the coast of Argentina during a deep-sea exploration, ...

Beds of Bathymodiolus mussels provide important habitat for other deep-sea critters, including sea stars, scaleworms and limpets. NOAA Ocean Exploration. The deep sea is the large ...

A newly discovered deep-sea creature has become an unlikely Internet star. After appearing in a popular YouTube video, a rare ...

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.

The deep sea is cold, dark and under immense pressure. Yet life has found a way to prevail there, in the form of some of Earth’s strangest creatures. Since deep-sea critters have adapted to near ...