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Fish

The new species lives in the tropical and subtropical waters of the Atlantic, from the eastern United States down to Brazil.

Scientists Identify a New Manta Ray Species, Just the Third Known in the World

Meet Mobula yarae, a large marine creature that lives along the coast in the Atlantic Ocean

Winter-run Chinook salmon are unique because they spawn in the summer, then migrate as adults to the Pacific Ocean in the winter.

For the First Time in Nearly a Century, Adult Winter-Run Chinook Salmon Are Swimming in California’s McCloud River

Video footage shows a female guarding her nest while several smaller males compete for positioning nearby

A river otter 

From Playful Otters to Pint-Size Owls, These Eight Awesome Animals Call the Chesapeake Bay Home

Blue crabs, bluebirds, beetles and many more creatures can be spotted in and around the bay—and scientists at the Smithsonian Environmental Research Center are paying attention

Scientists filmed the way killer whales hunt together. These images show one of the animals turning toward the other after a tail slap delivers a shock to herring.

Killer Whales Hunt Fish in Highly Coordinated Pairs and Perfect Their Movements With Practice, Drone Videos Reveal

Footage taken off the coast of Norway reveals that orcas team up to maximize their prey, according to a new study

A juvenile blacktip reef shark swims in shallow waters by the mangroves in Palau. This image was highly commended in the underwater category.

See 11 Stunning Images of Mangrove Forests and Their Wildlife, Showcasing the Trees’ Beauty and Fragility

The winners of the Mangrove Photography Awards shed light on the ecologically valuable but highly threatened coastal ecosystems

Breakthroughs in tagging technology are opening a window into the lives of smelt and other small swimmers—a shift some scientists say could transform our understanding of the underwater world’s more minute creatures.

A New Generation of Tiny Tracking Tags Offers a Fresh Look at the Lives of Little Fish

Researchers at the Department of Energy’s Pacific Northwest National Laboratory have developed a tag the size of a grain of rice that can also work underwater

A large prawn walks over a field of mineral-rich nodules in the Clarion-Clipperton Zone (CCZ).

As Interest in Deep-Sea Mining Grows, Scientists Raise Alarms About the Possible Ecological Consequences

Gathering minerals such as nickel, cobalt, manganese and lithium from the seabed could affect everything from sponges to whales. The long-term effects of these extractions remain uncertain

A catch of Baltic Sea cod in 1987 shows fish that grew more than three feet long, with Finnish fisheries biologist Eero Kalevi Aro.

These Cod Have Been Shrinking Dramatically for Decades. Now, Scientists Say They’ve Solved the Mystery

Eastern Baltic cod grow to much smaller sizes than they did just 30 years ago, because overfishing altered their genes, according to new research

A Honduran white bat (Ectophylla alba) flies from its roost.

Ten Stunning Nature Photos From the BigPicture 2025

From the beautiful to the bizarre, this annual photographic showcase shines a light on some of our planet’s most breathtaking species and places

Fishing guide Tori Arnona, 23, holds a redfish caught near Buras in Plaquemines Parish, Louisiana.

Can the Redfish, That Gulf Coast Culinary Icon, Be Brought Back From the Brink?

The Cajun cooking craze nearly wiped out the species native to Louisiana, but conservation stemmed the tide. Now the fish faces new threats

Wildtype's lab-grown salmon is now being sold at Kann, a Haitian restaurant in Portland, Oregon.

Lab-Grown Salmon Hits the Menu at an Oregon Restaurant as the FDA Greenlights the Cell-Cultured Product

The decision clears the way for the first cultured fish to join the small but growing alternative protein market

Many sea horse traders operate on the black market.

Sea Horse Smuggling Is a Big Problem, Despite Global Efforts to Protect These Beloved Aquatic Creatures

Between 2010 and 2021, authorities seized around five million individual sea horses worth more than $21 million

A baby Atlantic sturgeon caught from Virginia’s James River is measured by Matt Balazik, a research ecologist with Virginia Commonwealth University.

Once in Dire Straits, Atlantic Sturgeon Are Staging a Comeback on the East Coast

From Maine to Florida, the endangered, prehistoric fish is rebounding, but a recent study shows just how vulnerable the U.S. population remains

An artistic rendering of an early vertebrate being attacked by a sea-scorpion in dark waters

Our Teeth May Descend From Sensitive Bumps on Prehistoric Fish Armor, New Research Finds

Hundreds of millions of years ago, fish had sensory features on their exoskeletons that contained dentine, the material that makes our teeth sensitive today

Clownfish seem to become shorter during heat waves, according to the new study.

Clownfish Shrink Down Their Bodies to Survive Ocean Heat Waves, New Study Suggests

The adaptation appears to help the fish cope with high temperatures, since individuals and breeding pairs that shrank improved their survival odds

A seal catches a salmon off the coast of Washington State. Scientists are working to determine how much salmon the seals eat.

Salmon in the Pacific Northwest Are Facing a New Threat: Booming Populations of Seals and Sea Lions

The mammals’ return to the region represented a conservation success story, but their appetite for endangered fish is upsetting the balance of a delicate ecosystem

Birds glide above the forests that surround Anacapa Island, California.

What Free Diving in a Kelp Forest Taught Me About an Overlooked but Incredibly Valuable Ecosystem

A photographer shares the epiphanies she has had while chronicling underwater jungles off the California coast

A variety of marine creatures and unique features can be found in the deep sea off Norway, including the dumbo octopus, colorful anemones and venting chimneys.

As Norway Considers Deep-Sea Mining, a Rich History of Ocean Conservation Decisions May Inform How the Country Acts

In the past, scientists, industry and government have worked together in surprising, tense and fruitful ways

Northern snakeheads were first discovered in American waters in 2002.

These Large, Snake-Like Fish Are Invading the United States—and Authorities Want You to Kill Them

Invasive northern snakeheads can “walk” on land, breathe air and survive out of water for several days, and they also compete with native species in waterways

Caught on Lake Livingston near Houston using a two-pound line, the massive alligator gar weighed 153 pounds.

Angler Catches 153-Pound Behemoth in Texas Using Ultra-Light Tackle, Likely Setting a New World Record

Art Weston and Kirk Kirkland reeled in and released the enormous freshwater fish, known as an alligator gar, after a four-hour battle on Lake Livingston

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