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Oceans

Photos of the kitefin shark glowing in the dark.

New Research

Nearly Six-Foot-Long Glowing Shark Discovered in Deep Sea Off New Zealand

The kitefin shark is one of three species of glowing sharks described in a new paper

The cyanobacteria species that produces gatorbulin-1, tentatively identified as Lyngbya confervoides, forms these reddish-green, hair-like structures which are a collection of connected single cells rather than a true multicellular organism.

Smithsonian Voices

Scientists Find Blue-Green Algae Chemical With Cancer-Fighting Potential

The discovery shows how studying marine biodiversity can enhance biomedical research.

The ring-shaped coral islands known as atolls, like this one in the Maldives Islands in the Indian Ocean, may trace their formation to sea levels repeatedly rising and falling over hundreds of thousands of years, geologists say.

Why Some Geologists Say Charles Darwin’s Theory of Coral Atoll Formation Is Wrong

Sea levels rising and falling over hundreds of thousands of years may have helped build the oceanic structures

A polynya opens up in the Weddell Sea.

How Rivers in the Sky Melt Huge Holes in Antarctic Ice

New research is causing scientists to rethink how polynyas—massive openings in the sea ice—are formed

To aid the turtles in flushing out their digestive systems clogged with crude oil, workers at the sea turtle rescue are feeding them mayonnaise, which will break down the tar and make it easier to expel out.

Turtles Caught in Disastrous Oil Spill Treated With Mayonnaise

The tar-covered animals were given the condiment to flush out their digestive systems

The health of corals on the Great Barrier Reef is routinely being threatened by hot water temperatures. The Australian government is investigating a range of techniques to try to protect the corals and stave off warming.

Could Flushing Cold Water Over the Great Barrier Reef Save Corals?

Lack of action on climate change is forcing scientists to devise ever more elaborate ways to stave off damage

A woman at the Gador nature reserve in Israel holds a dead baby sea turtle covered in tar from the oil spill on Feb. 20, 2021.

Oil Spill Off Israeli Coast Covers Beaches and Wildlife in Tar

Authorities are searching for the ship responsible for the unreported spill

NOAA geneticist Patricia Rosel and Smithsonian marine mammal collection manager John Ososky examine the Rice’s whale skeleton at the Smithsonian whale warehouse in Maryland.

How the Rice’s Whale Became a New Species

The intact skeleton of a washed-up whale gave scientists the final pieces of evidence needed to make the designation

“There’s all sorts of reasons they shouldn’t be there,” says British Antarctic Survey biologist Huw Griffiths

New Research

Mysterious Sponges Live on a Boulder Under 3,000 Feet of Antarctic Ice

When scientists aiming to collect a sediment sample were stopped by a boulder, they found unexpected life instead

Fin whale songs are some of the loudest animals in the ocean, producing calls that can reach 189 decibels and are almost as loud as container ships.

New Research

Researchers Use Whale Calls to Probe Undersea Geology

The study finds that fin whale songs are powerful enough to reverberate through the Earth’s crust, allowing scientists to study its thickness and structure

Sea whip coral can come in a variety of colors, from vivid reds and oranges, yellows to rich violets and can grow up to three feet long.

Tangled ‘Cord’ Mistaken for Litter Is Actually a Sea Creature

Along the East Coast and Gulf of Mexico, beachgoers mistake sea whip coral for discarded junk

The black sea cucumber Holothuria atra is found in shallow waters along reefs and uses sand to coat itself for camouflage and protection from the sun.

Sea Cucumber Poop Could Revitalize Coral Reefs

In one reef, three million sea cucumbers released 64,000 metric tons of nutrient-packed poo back into the ecosystem

An artist's rendering of a new species of mosasaur named Xenodens calminechari. The marine reptile was about the size of a porpoise and had serrated shark-like teeth.

New Research

Newly Discovered Marine Reptile Sawed Prey With Serrated Teeth

Researchers say the new species of mosasaur had teeth unlike those of any known reptile

A 38-foot male whale washed up along Sandy Key in the Florida Everglades in January 2019. Researchers have now determined that the whale is a member of a previously unknown species they've dubbed Rice's whale. A necropsy revealed a 3-inch hunk of plastic lodged in its gut that may have contributed to its demise.

New Research

Large New Whale Species Identified in the Gulf of Mexico

Named Rice’s whale, the species can reach lengths of 42 feet and lives in the Gulf’s warm waters all year

Archaeologists exploring the submerged landscapes of Australia, often called sea country, recently found ancient sites underwater.

The Search for Aboriginal History Off the Coast of Australia

Archaeologists exploring the waters near Western Australia’s Murujuga are finding ancient sites a short dive below the sea’s surface

An oceanic whitetip shark swimming in the open ocean. This species was common in the 1970s but its population has since declined by 98 percent, according to a new study.

New Research

Oceanic Sharks and Rays Have Declined 70% Since 1970

Fishing fleets have indiscriminately slaughtered sharks for decades and a new study catalogues the environmental damage done

Three adult gray whales photographed via drone in 2017, 2018 and 2019 in Laguna San Ignacio off the coast of Mexico. The three shots show increasingly skinny whales, a bad sign for an animal that needs to make a 10,000-mile return trip to reach its feeding grounds.

New Research

Nearly 400 Gray Whales Have Died Off the West Coast Since 2019

Scientists say the die-off, which is entering its third year, is likely due to a scarcity of food in the animals’ cold water feeding grounds

An Argo float, seen in the foreground, is a battery-powered device that automatically measures and transmits information about the environment.

How the Pandemic Is Undermining Weather Monitoring

Scientists are scrambling to patch the cracks forming in the global marine weather monitoring system

Warming waters cause the sharks to hatch early and underdeveloped, making them vulnerable to predation.

Ocean Warming Threatens Baby Sharks in the Great Barrier Reef

Researchers found the hatchlings of the egg-laying epaulette shark are weakened by rising sea temperatures

Researchers estimate this seagrass found in the Mediterranean could trap about 867 million plastic pieces per year in coastal areas.

New Research

This Seagrass Traps Marine Plastic

Researchers find the Mediterranean species of seagrass collects plastics in fibrous balls that form from its fallen leaves

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