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Fish

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

Researchers Daniel Cerveny and Marcus Michelangeli collecting salmon from the Dal River in Sweden.

Salmon Are Being Exposed to Our Anti-Anxiety Medication, and It’s Making Them Take More Risks, Study Suggests

Atlantic salmon exposed to a common anti-anxiety drug migrate faster, according to new research. That’s not necessarily a good thing

Scientists recorded rig sharks producing sounds—potentially with their teeth. The clip is thought to be the first documentation of its kind.

Listen to the First Known Recording of Shark Sounds, a ‘Weird’ Audio Clip Captured at a Marine Lab in New Zealand

Researchers detected short clicking noises from rig sharks during handling in the lab, though they’re not sure why or how the sound is produced

"Mr. Blobby" is a blobfish discovered in 2003 off the coast of New Zealand. The preserved specimen is now housed at the Australian Museum in Sydney.

Voters Crown the ‘World’s Ugliest Animal’ as New Zealand’s Fish of the Year

The blobfish is specially adapted to life in the deep ocean, but it looks like a shapeless blob when brought to the surface. It beat out the other candidates with its “unconventional beauty”

The fish feasted on phantom midge larvae, insects and bivalves before they died.

Paleontologists Stumble Across 15-Million-Year-Old Fish Fossils That Are So Well Preserved, Their Last Meals Are Intact

Discovered in Australia, the fossils represent a new species that lived during the Miocene epoch and highlight how iron-rich rock can protect specimens over time

A new study suggests that the lemon shark, pictured here, is a better analogue for the megalodon's size than a great white.

Megalodon Might Have Been Longer and Skinnier Than Previously Thought, Growing Up to 80 Feet

A new paper suggests the enormous, extinct shark looked less like a bulky great white and more like an elongated lemon shark

Individual Antarctic krill are small, but the animals live in gigantic groups that can be seen from space.

Tiny Antarctic Krill Benefit the Planet in Big Ways, but Face a Barrage of Threats

The bountiful creatures sequester carbon and are a vital food source for marine predators, but their future is uncertain

Greenland sharks can live to be nearly 400 years old.

Greenland Sharks Can Live for 400 Years. Scientists Are Using DNA to Unravel Their Longevity Secrets

These large, mysterious creatures are the longest-living vertebrates on the planet—and their genomes could contain clues to how they prevent cancer and reach such an advanced age

In October 2024, scientists created dozens of man-made nests and deposited 300,000 Chinook salmon eggs. Now, those eggs are hatching.

Chinook Salmon Are Swimming in This California River for the First Time in More Than 80 Years

The juvenile fish recently hatched from eggs that scientists deposited in the gravelly riverbed of the North Yuba River last fall

Nutria have voracious appetites for vegetation, leading them to destroy wetland ecosystems.

The U.S. Fish and Wildlife Service Wants You to Eat These Giant, Invasive Rodents

As part of National Invasive Species Week, the agency is calling on Americans to “eat the invaders,” including swamp-dwelling nutria

An oarfish surfaced in Playa El Quemado, Mexico, earlier this month.

Cool Finds

See a Deep-Sea Oarfish Caught Alive on Video in a Rare Encounter on a Beach in Mexico

In Japanese folklore, appearances of these elusive marine creatures dubbed ‘doomsday fish’ are believed to foreshadow earthquakes, though scientists found no strong relationship between these events in a recent study

One of the study authors, Maëlan Tomasek, with a fish. The scientists found that wild fish will start to follow humans for food and can recognize individual divers based on what they're wearing.

Wild Fish Can Tell Human Divers Apart Based on Their Outfits, Study Suggests

Using visual cues, including colors on wetsuits, seabream in the Mediterranean learned to identify researchers that would feed them

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