The video, taken by Gold Coast Freediver (@goldcoastfreediver), shows a shark ray gliding gracefully over the ocean floor.

The ocean is one of Earth's greatest mysteries, with miles of unexplored terrain that scientists are still trying to uncover.

Beachgoers in the San Francisco Bay Area encountered a rare hoodwinker sunfish washed ashore on a beach on Sept. 7.

On a coral reef off the eastern coast of Australia, scuba divers set up a tent-like trap in hopes of collecting some easily ...

Two massive sea creatures were spotted being “affectionate” during a “rare” sighting off the coast of California. The “tender ...

Scientists in the crewed submersible Alvin also discovered two additional related deep-sea species, according to a study.

NEW YORK – An underwater voyage has revealed a network of creatures thriving at the bottom of deep-sea ocean trenches. In these extreme environments, the crushing pressure, scant food and lack of ...

The vast array of organisms in the deep sea remains a mystery to humans. Now, marine biologists can add one more puzzle to the list. A collection of odd materials was discovered nearly four miles ...

Plastic risk maps reveal hidden ocean hotspots where wildlife faces harm from ingestion, entanglement, and chemicals.

The discovery challenges "long-standing assumptions about life's potential at extreme depths," study authors said.