The deep sea is one of the hardest parts of the ocean ... Atlantic catfish, ocean catfish, devil fish, and wolf eel. They are named for their wolf-like front teeth. Wolffish live in the North ...

Miles below, a deep-sea fish approached the camera’s bait then, changing its mind, swam backward to escape. The footage turned out to be a first-of-its-kind sighting — but it wasn’t the last.

Look, here comes a blobfish! This thrilling deep-sea fish was voted the world's ugliest animal by the Ugly Animal Preservation Society. But its jelly-like skin looks much more natural at 900 meters.

A "sea devil" lurks off the Japanese coast ... a terror to small fish that meander by. Using a wiggling "lure" atop its head, the yellow goosefish relies on stealth ...

The silver spinyfin has an extraordinary diversity of rod photopigments, which researchers propose may allow it to see color in the deep, dark sea. After a year teaching an algorithm to differentiate ...