Fish

In recent years, the European perch (Perca fluviatilis) population has been steadily declining due to the combined impact of climate change, pollution and overfishing.

Italian Divers Revive Centuries-Old Tradition to Help Save European Perch

Nurseries built from bundles of tree branches may help conserve the freshwater fish in the age of climate change

Jurassic lampreys help bridge the evolutionary gap between the earliest lampreys and those species still alive today.

These Large, Flesh-Eating Lampreys Lived 160 Million Years Ago

Paleontologists in China recently unearthed the fossilized remains of two new species of lamprey, a group of jawless fish that dates back 360 million years

Atlantic salmon spend most of their lives in the cool waters of the ocean. When they venture upstream in freshwater rivers to spawn, however, they encounter challenging warmer waters.

Engineers Create 'Air Conditioning' for Salmon With Chilled Patches of River Water

Wild Atlantic salmon can struggle with heat as they swim upstream to spawn—but artificial "thermal refuges" may help them cool off

A chum salmon in Alaska's Katmai National Park and Preserve. Salmon numbers are declining in some places due in part to climate change.

Climate Change Is Pushing Salmon North in Alaska, Scientists Say

Researchers recently found about 100 chum salmon spawning in the Arctic, suggesting the species is shifting to new habitats

The female Pacific footballfish measured about 14 inches long.

Rare Deep-Sea Anglerfish Washes Up on a California Beach

The finding marks the second time in three years that an elusive Pacific footballfish has been found on the sand at Crystal Cove State Park

A killer whale in the Salish Sea is observed harassing a porpoise.

Why Do Orcas Keep Harassing Porpoises?

An endangered group of killer whales in the Pacific Northwest has been toying with porpoises for decades—and new research offers some possible explanations

Orcas are opportunistic feeders that will take advantage of human fishing activities to get an easy meal.

Nine Orcas Have Died in Fishing Gear Near Alaska This Year

A "new behavior" from the animals might be linked to this sudden uptick in deaths, as they have been feeding in front of fishing nets, a trade group says

Art Weston is waiting to hear whether his catch will break two records.

Angler Catches 283-Pound Alligator Gar in Texas, Potentially Setting Two World Records

Art Weston and Kirk Kirkland spent nearly three hours reeling in the gargantuan fish

Methuselah, the oldest fish living in an aquarium, was transported to California in 1938.

Methuselah, the World's Oldest Living Aquarium Fish, Could Be More Than 100

Using a new and noninvasive technique, researchers analyzed the DNA of 33 lungfish in institutions across the U.S. and Australia to determine their ages

A puffin on Eastern Egg Rock carries fish to feed its young.

Puffins Are Making a Comeback in Maine

After a down year in 2021, the birds have had two good years in a row

Outside of Earth, is there any place a human could survive unprotected for even ten seconds?  

Could Humans Survive Unprotected Outside of Earth's Atmosphere for Even Ten Seconds?

You’ve got questions. We’ve got experts

A zoo employee weighs a meerkat during the annual weigh-in.

London Zoo Weighs All 14,000 of Its Animals, 'From the Tallest Giraffe to the Tiniest Tadpole'

The annual measurements help zookeepers track each animal's health over time

The tanks used for storing treated water at the Fukushima Daiichi Nuclear Power Plant in Japan are almost at capacity.

Japan Begins Release of Treated Nuclear Wastewater Into the Pacific Ocean

Twelve years after the Fukushima Daiichi nuclear disaster, the move is a polarizing step toward decommissioning the defunct power plant

Hogfish can change their color in less than a second to blend in with their surroundings.

How Color-Changing Hogfish Use Their Skin to 'See' Themselves

Light-sensitive proteins in the fish's skin could play a role in monitoring how they camouflage, researchers theorize in a new study

A trumpetfish shadows a parrotfish. A new study suggests that this tactic makes it harder for prey to notice the predatory trumpetfish behind the non-threatening, plant-eating parrotfish.

These Long, Skinny Fish Hide Behind Bigger Fish to Sneak Up on Their Prey

Scientists made 3D-printed models of fish and tested them in the ocean to study this clever hunting strategy

The young swell shark glows under a blacklight. The swell shark's eyes have adapted to filter out other wavelengths of light so they can better see other sharks.

See the Baby Glow-in-the-Dark Shark Hatched at the Tennessee Aquarium

In coastal waters, swell sharks appear a glowing green color to other members of their species due to a special eye adaptation

A diver swims around a coral reef in Key West, Florida, on July 14, 2023. Coral reefs in the Florida Keys are at risk of bleaching and death because of very hot water temperatures this summer.

Water Temperatures Hit 'Hot Tub' Levels in the Florida Keys

A buoy in Manatee Bay recorded 101.1 degrees Fahrenheit on Monday evening, as coral reefs suffer

A researcher holds two White's seahorses before releasing them into Sydney Harbor.

Scientists Release Record-Breaking Number of Baby Seahorses Into Sydney Harbor

The team installed eight new “seahorse hotels,” which will provide much-needed homes for the endangered animals

Researchers caught and tagged a 13-foot-long female sawfish off the coast of Cedar Key, Florida, in June.

13-Foot Endangered Sawfish Spotted in Northern Florida Hints at a 'Slow Recovery'

Scientists tagged the rare animal farther north than any such fish in decades, suggesting the species is returning to areas it once lived

Trub, a leftover of the brewing process, could be key to scientists’ quest to develop a cheap, effective artificial scent guide for hatchery-raised salmon.

How Far Will Salmon Swim for a Craft Beer?

Researchers in Oregon hope a surprising aroma will lure stray fish back to their home hatcheries

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