What are those dark spots in the water and why are lifeguards so concerned about them? All you need to know about bait balls ...

You're by the water's edge, observing a turquoise lagoon, then a little further away, you see an almost black sea at the foot of a cliff. Why does the ocean take on such different hues, from ...

The dinoflagellate red Noctiluca scintillans cause the aptly named "blue tears'' of Taiwan’s Matsu Islands. These sea sparkles are most visible after dark along the shores of the Matsu Islands.

Casio is channeling the beauty of the ocean with its new G-Shock Hidden Glow Volume 2: Sea of Stars series. These watches bring a design that mimics the mesmerizing glow of bioluminescent plankton ...

Life & Luxury Travel Swim with whale sharks at this seldom-visited reef A 10-day cruise through Indonesia’s Raja Ampat in a 12-cabin pinisi ship is a feast of snorkelling, relaxing and ...

"Most of the ocean, however, is completely dark. Hardly any light penetrates deeper than 656 feet, and no light penetrates deeper than 3,250 feet." said the NOAA.

Before then, the ocean was thought of as dark and ominous, and largely empty. Attenborough photographed the day after his appointment as controller of BBC2 in 1965. (Getty: Ron Burton) ...

These organisms emit a blue glow when disturbed, such as when fish swim by or waves crash on the shore, in contrast to the steady glow emitted in the “milky seas” event.

Blue holes are some of the most fascinating geologic formations on Earth. As the name suggests, a blue hole resembles a kind of underwater well of dark water surrounded by coral reef, and these ...

Midday in the sunshine, it appears as a bright blue. In the evening, however, the blue transforms into a deep and dreamy shade. “Even in dark conditions, it has nuance,” Oba said.

That helped push combined Antarctic and Arctic sea ice cover – ocean water that freezes and floats on the surface – to a record minimum extent of 16.04 million sq km on Feb 7, Copernicus said.