Chinese mitten crabs had never been found in the Pacific Northwest, until now.

Invasive Crab With Furry, Mitten-Like Claws Detected for the First Time in the Pacific Northwest

A commercial fisherman nabbed a large male Chinese mitten crab in the lower Columbia River late last month, putting biologists on high alert

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

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

The Punta Medanosa colony of Magellanic penguins on the coast of Argentina has nearly 8,000 breeding pairs. Other colonies number in the hundreds of thousands.

What Did Scientists Learn After Thousands of Penguins Were Slaughtered by Mountain Lions?

The thriving bird colonies likely grew over several decades because local shepherds had temporarily eliminated pumas

The Onodera Group, a Michelin-starred Japanese sushi restaurant chain, placed the winning bid for the massive fish.

Massive Bluefin Tuna the Size of a Motorcycle Sells for $1.3 Million at a Japanese Fish Market

The fish weighed 608 pounds, which is also about the same size as an adult male grizzly bear. It garnered the second highest bid at the Toyosu Market since records began in 1999

The engraved plaquettes sport grid-like patterns that researchers think represent fishing nets.

New Research

These Ice Age Artworks Etched Into Rock 15,800 Years Ago May Be the Earliest Known Depictions of Fishing

Found in western Germany, the stone plaques feature etchings of fish trapped in grid-like nets, according to a new study

Scientists feared the giant salmon carp had gone extinct, but recent discoveries revealed the elusive species is still in the wild.

A Massive, Mysterious ‘Ghost’ Fish, Feared Extinct for Nearly 20 Years, Has Been Rediscovered in Cambodia

The giant salmon carp was formally identified in 1991, and since then, fewer than 30 individuals had been documented

The Upper Klamath River is also part of restoration work. The salmon's return inspires biologists to continue their efforts in the upper basin.

Salmon Make a Long-Awaited Return to the Klamath River for the First Time in 112 Years, After Largest Dam Removal in U.S.

Chinook salmon spark excitement among local Klamath Tribes, who have advocated for decades to restore the flow of the river in California and Oregon

Divers saw nine species of game fish and soft coral starting to grow on the submerged cars last month.

No Longer Full of Commuters, Atlanta’s Old Subway Cars Are Now Filled With Fish

Two Metropolitan Atlanta Rapid Transit Authority railcars were added to an artificial reef off the coast of Georgia to create more wildlife habitat

This rare leucistic green sea turtle was discovered among nests, supported by local conservation efforts, in Papua New Guinea’s Conflict Islands.

See 15 Stunning Images From the Ocean Photographer of the Year Awards

The winning and highly commended underwater photography spotlights breathtaking animal behavior, conservation needs and the otherworldly environment of Earth’s oceans

A mother manatee and her calf in Florida's Crystal River amid eelgrass, which is crucial for supporting the large mammals.

See 13 Captivating Images From the Wildlife Photographer of the Year Contest

The highly commended shots provide a preview of the 60th annual competition, which spotlights astounding animal behaviors and the conservation issues they face

Percebes are generally under two inches long, with a fleshy body and pieces of shell that lead to a point on one end. Let's be honest, they look like dinosaur toes.

Why Are Fishermen Braving Dangerous Waters to Harvest Bizarre-Looking Sea Creatures? They’re Delicious

Gooseneck barnacles are tasty, but expensive, given the skill and guts it takes to gather them from slick rocks slammed by waves

The cotton candy lobster caught by Joseph Kramer.

Rare 1-in-100-Million ‘Cotton Candy’ Lobster Found off the Coast of New Hampshire

A rare genetic mutation gives the crustacean its unique hues but also makes it more vulnerable to predators

Spinner dolphins swim in the Red Sea. Research has shown some dolphins are shy, while others are extroverted.

Five Amazing Dolphin Behaviors, Explained

From calling each other by name to using tools, these social creatures are a lot like us

While scientists have seen colossal squid before—like this specimen examined by New Zealander researchers in 2014—their interactions have always been with animals that were either pulled from the depths, washed up on shore or otherwise removed from their natural habitat.

Is This the First Recorded Footage of a Colossal Squid Living Freely?

The only sightings of the animals so far have come from corpses or creatures dragged up from the depths

Evidence suggests blue whales were an important food source for Icelanders.

Medieval Icelanders Likely Hunted Blue Whales

New research suggests Viking-age hunters took down the biggest animal on Earth

The cutter Douglas Munro and crew searching for illegal, unreported and unregulated fishing activity—including high seas drift-net fishing

How A.I. Is Revolutionizing Marine Conservation

Driven by a childhood marked by war and environmental devastation, marine scientist Dyhia Belhabib developed an innovative technology to combat illegal fishing

Crew aboard a U.S. Navy P-8 Poseidon aircraft spotted the men's "HELP" sign from the air.

Stranded on a Remote Pacific Island, Three Men Spelled ‘HELP’ With Palm Fronds and Got Rescued

The experienced sailors lived on coconut meat and well water for more than a week, after their boat became damaged

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