From a ballet of white-tip reef sharks to a cardinal fish releasing freshly hatched babies from its mouth, these underwater ...

The marine photographer who captured the footage said it could be the world's first recorded sighting of a black seadevil ...

Imagine standing on the edge of a vast expanse of water, the horizon stretching endlessly before you. What you're looking at is either an ocean or a sea—two of Earth's most awe-inspiring bodies ...

When hundreds of eerily perfect circles were discovered on the bottom of the Mediterranean Sea, theories abounded about what they could mean. Four years of underwater research revealed a lost world.

sweeping three people out to sea. Dramatic footage and images showed a restroom building toppled by waves on the beach, a wrecked pier floating in the ocean and debris strewn across the water.

According to the organization, the fish is a so-called “black seadevil” known by its scientific name Melanocetus johnsonii. They typically swim between 650 and 6,500 feet below the ocean’s surface.