Deep-sea researchers have launched ... zones to explore the mysteries surrounding dark oxygen. Bubbles of oxygen are seen against a dark background. Dark oxygen produced on the floor of the ...

Offshore flooded caves, so-called ocean blue holes, are extensions of the sea, subject to the same ... structure of the inland blue holes—deep, dark, sheltered, with little tidal flow ...

A recent deep-sea expedition into the Tonga Trench in the ... The Pacific Sleeper Shark is a silent predator designed for the cold, dark depths of the ocean. These sharks can move quietly through ...