Scientists have uncovered why big predators like sharks spend so much time in the ocean’s twilight zone. The answer lies with ...

For decades, oceanographers have known that something did not add up in the deep sea. Huge predators like sharks and tunas were spending long stretches in the dim “twilight zone,” yet the known prey ...

Dynamic mounds made of methane at a depth of some 3,640 meters act like “frozen reefs” for a bizarre array of deep-sea ...

Scientific divers have navigated a series of treacherous dives more than 330 feet deep in an attempt to unravel the mysteries of deep ocean reefs. They’re finding new species — and evidence of both cl ...

Scientists have long assumed the deep-sea Alicella gigantea was an uncommon survivor of the abyss.

Mars may be around 140 million miles away from Earth, but the red planet is influencing our deep oceans by helping drive “giant whirlpools,” according to new research. Scientists analyzed sediments, ...

Giant amphipod species Alicella gigantea, once thought to be very rare, is found to inhabit the majority of Earth's deep ...

For deep reef divers, descending into the ocean’s mesophotic layer can feel like exploring the moon. Discovering never-before-seen marine species is part of the mission.

Researchers retrieved reef monitoring devices that had been placed in deep coral reefs in Guam. The devices were placed up to 330 feet below the surface.

A transparent goby fish drifted through the darkness, its skeleton visible through paper-thin skin. Nearby, a sea slug wore ...

When Earth was a molten inferno, water may have been locked safely underground rather than lost to space. Researchers ...