Oceans

The embryo of a small-spotted catshark, safe inside its egg case, is being raised at the aquarium Oceanogràfic València by Associació Lamna, a nonprofit that promotes shark conservation and research. At this stage, the young shark's gills are still external and it is growing from the sustenance provided in the yolk, visible at the bottom of the egg case.

Biologists Rescue Unborn Baby Sharks at Fish Markets

Scientists are collecting egg cases from recently caught pregnant sharks, raising the babies and releasing them into the wild

Plastic debris covers much of the sand on Henderson Island.

Plastics Make Beaches Hotter During the Day and Colder at Night

A study of remote islands shows that debris alters sand temperatures

Three giant rocks—Tokia, Rebua, and Kamatoa—sit in the ocean south of Makin Island in the Republic of Kiribati.

How Indigenous Stories Helped Scientists Understand the Origin of Three Huge Boulders

Legends spurred researchers to form a theory about Makin Island's distinctively out-of-place rocks

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Ode to an Orca

A photographer takes the plunge into forbidding waters off Norway for an extraordinary encounter with orcas

After a year of strict Covid-19 lockdowns which brought a severe economic standstill, Panama is awaiting the return of visitors and the restart of the tourism industry.

For Panama's Fall Whale-Watching Season, Scientists Offer Tips for Safeguarding These Magnificent Creatures of the Deep

For humpback whales, bottlenose dolphins and coastal manatees, tourism is a mixed bag, making vigilance ever more important

Killer whales are among the oceans’ top predators. But in Iceland, pilot whales have them running scared.

Why Do Pilot Whales Chase Killer Whales Near Iceland?

Scientists are working to understand the strange inter-cetacean conflict

A green turtle surrounded by glassfish in Ningaloo Reef, Western Australia. Green sea turtles, which are classified as endangered, migrate long distances between feeding grounds and the beaches from where they hatched.

See Stunning Undersea Images That Showcase Our Blue Planet

From reef sharks to bioluminescent squid, the Ocean Photography Award highlights the wonders and perils of life in the sea

Courtney Gallaher’s Women in Science students at Northern Illinois University created quilt blocks representing astrophysicist Margaret J. Geller, biologist Rachel Carson, and mathematician Ada Lovelace.

Inside the Growing Movement to Share Science Through Quilting

The classic medium allows researchers, students and artists to tell stories about science, technology, engineering and math

A diver swims over a bleached section of the Great Barrier Reef near Heron Island.

The Planet Has Lost Half of Its Coral Reefs Since 1950

A new study finds dramatic declines in coral reef cover, biodiversity and fish abundance

Environmental scientist Alexandra Ordoñez Alvarez from the University of Queensland collects data in Far Northern Great Barrier Reef on Ashmore Bank.

Scientists Complete the First Map of the World's Coral Reefs

Nearly 100,000 square miles of the organism have been charted in high detail to create a tool for conservationists to help save them

Hammerhead sharks have are considered critically endangered.

More Than a Third of Shark Species Are Now Threatened With Extinction

Overfishing, habitat loss and climate change are behind the 'desperate' decline

A Brief, Fascinating History of Ambergris

The odd, enduring appeal of a scarce commodity few people use and no one really needs

The Nautilus, a research vessel operated by the Ocean Exploration Trust, and the ROV Hercules (in the water) on the hunt for a cancer-busting marine bacteria.

A Marine Bacteria Species Shows Promise for Curing an Aggressive Brain Cancer

A new glioblastoma drug is derived from a microbe found in the ocean at depths of up to 6,500 feet

Female octopuses were far more likely than males to 'throw' objects at others.

Female Octopuses Throw Things at Male Harassers

Scientists observed common Sydney octopuses launching shells and silt at particularly annoying individuals

A study of two dozen common cuttlefish reveals they can recall specific details regardless of age.

Unlike Humans, Cuttlefish Have Sharp Memories Even in Old Age

The cephalopods remember when, where and what they ate until days before death

Olive sea snakes are among the largest marine snake species and sometimes make contact with divers.

Venomous Sea Snakes That Charge Divers May Just Be Looking for Love

A new study suggests apparent attacks are actually fleeting cases of mistaken identity

The museum's sculptures promote coral growth and will eventually serve as homes for sea creatures.

You Can Now Explore an Underwater Sculpture Museum in the Mediterranean

Artist Jason deCaires Taylor placed 93 statues of people and plants in a submerged "forest" off the coast of Cyprus

Both beer and wine are thought to predate distilled spirits.

'Which Came First: Beer or Wine?' and More Questions From Our Readers

You've got questions. We've got experts

Oceanix is gearing up to build a prototype of a 5-acre city for 300 residents in a yet-to-be determined location.

In the Face of Rising Seas, Are Floating Cities a Real Possibility?

A scale model of Oceanix City, a concept capable of supporting more than 10,000 residents, will be featured in the Smithsonian's upcoming 'Futures' exhibit

There are many reasons to be worried about the state of the world’s oceans. But some scientists say it’s important to point to successes, in order to motivate people to take further, evidence-based action.

Seven Reasons to Be Optimistic About the World's Oceans

The health of the ocean is under threat, but these good-news stories deserve attention too

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