Photographers capture mutant crayfish, cleaning fish, and synchronized whales in this year's top underwater contests.

An upside-down jellyfish drifts in a shallow lagoon, rhythmically contracting its translucent bell. By night that beat drops ...

A trippy image of a coral, a huge swarm of mayflies and a ravenous spider were among the winners of the Close-up Photographer ...

During a dive off Argentina, scientists documented a rare jellyfish discovered a little over a century ago and seldom seen since, as well as the fish that keep it company.

Invisible clouds of sediment created by underwater mining spread for miles, putting ocean floor ecosystems at risk.

Even in some of the most isolated corners of the Pacific, plastic pollution has quietly worked its way into the food web. A ...

TAMPA, Fla. — As the government shutdown continues, Feeding Tampa Bay is taking proactive steps to support affected federal employees in the area. A new relief site at the Causeway Center is being ...

The Atlantic giant cockle is one of the largest mollusks in the ocean. Read here to learn about them and their large tongue.

Ocean pollution is quietly draining energy from seabirds’ cells, as mercury and forever chemicals disrupt mitochondria even ...