A sargassum bloom the width of the Atlantic Ocean caused havoc on beaches, but locals in Mexico and the Caribbean are fast finding ways to turn the seaweed invasion to their advantage.

Octopuses use their arms to ‘lick’ prey – which researchers say adds to evidence that the cephalopods’ eight appendages are analogous to tongues with ‘hands’ and ‘brains’

Ram's horn shells are small, delicate spiral structures beachcombers can commonly find throughout the world.

Australian scientists have discovered a detached reef more than 500 metres high – taller than the Empire State Building – at the northern end of the Great Barrier Reef. The “blade-like” vertical reef about 130km off Cape York, Australia’s north-eastern tip, was found during a 3D seabed mapping exercise conducted from a ship owned by the Californian non-profit Schmidt Ocean Institute.

The False Bay ocean food chain in Cape Town began to change significantly in 2015 with the appearance of shark-eating killer whales.

You'd be surprised where great white sharks spend a lot of their time hunting prey. Understanding how these predators feed is important for managing human-shark interactions. World-first research into shark stomach contents from University of Sydney and NSW Government scientists.

Scientists documented four new species of walking shark that they say have developed the ability to walk very recently. Walking sharks use their fins to physically walk along the seafloor rather th…

U.S. authorities on Friday gave wildlife managers in Washington, Oregon and Idaho permission to start killing hundreds of sea lions in the Columbia River basin in hopes of helping struggling salmon and steelhead trout.

There are 12-21 million tonnes of tiny plastic fragments floating in the ocean, scientists say.

In 2018, a super-typhoon destroyed 80% of the corals in Hoi Ha Wan bay off the Sai Kung peninsula in Hong Kong. In the city’s strongest storm since records began, winds reached 155mph (250km/h) and battered the reefs, leaving behind mostly scattered debris and broken coral skeletons. A few coral species survived, but these will likely take decades to regrow to their former state.

The partial skull of an armoured fish that swam in the oceans over 400m years ago could turn the evolutionary history of sharks on its head, researchers have said. Bony fish, such as salmon and tuna, as well as almost all terrestrial vertebrates, from birds to humans, have skeletons that end up made of bone. However, the skeletons of sharks are made from a softer material called cartilage – even in adults.

A new study finds corals on the Australian mega-reef declined 50 percent between 1995 and 2017

The "earplugs" of blue whales are preserved in their skulls throughout their lives, and keep a record of chemical changes in the animals' bodies.

A Newcastle sailor's trip across the Pacific Ocean after the Japan tsunami was frighteningly similar to a nightmare.

Explore the world’s new coastlines if sea level rises 216 feet.

For the seahorse, the shape of its head, along with its stealthy approach and lightening speed, literally makes a meal of some of the ocean’s most sought after prey: the copepod, according to a new study.

Rob Robbins and Steve Rupp have been diving under the Antarctic sea ice for a combined 60 years. Hang around their dive headquarters at McMurdo Station and you’ll see rows of oxygen tanks, wetsuits, and breathing apparatus.

The shape of the seahorse's head helps it sneak up on copepods without being noticed, a new study says.

A new study published in Nature Communications by researchers at the University of Texas at Austin and the University of Minnesota revealed that the very traits which make the seahorse so laughable - like its’ slow movements and weird shape – are actually what makes it so cunning.

It’s a truism that the ocean depths will remain Earth’s last great wilderness, and judging by the recent find of a new species of 'skeleton shrimp' there’s still a lot of eye-popping discoveries yet to be made.