Fish

A museum curator gives a sense of scale to the reconstructed jaws of the fossil shark Otodus megalodon.

Was Megalodon Slimmer Than Previously Thought?

A new study has spurred scientists to debate the shape of prehistory’s biggest shark

Bottom trawling is a polarizing fishing practice that involves dragging heavy nets and equipment across the seafloor.

Seabed Trawling May Be Spewing Huge Amounts of CO2 Into the Atmosphere

New research suggests the controversial fishing method is also contributing to increased ocean acidification, which can harm marine wildlife

Poor sad blobfish, voted the world’s ugliest animal.

In Defense of the Blobfish: The 'World's Ugliest Animal' Is Our Fault

The distinguished blobfish has been judged unfairly

A group of grey reef sharks and blacktip reef sharks at La Vallée Blanche in French Polynesia in 2018.

Sharks Are Being Killed at Rising Rates Despite Increased Regulations

Global bans on finning have inadvertently opened up shark meat markets, prompting demand for threatened species, a new study reveals

This year was marked by many broken records in the ocean.

The Top Ten Ocean Stories of 2023

Major discoveries, an undersea tragedy and international cooperation were some of the biggest saltwater moments of the year

Seabirds, such as puffins, have a well-earned reputation as sentinels of change in marine environments.

How Seabirds Can Help Us Predict the Size of Fish Stocks

The scientists who study terns, puffins and other birds are trying to get fisheries managers to heed their warnings

Larval bony-eared assfish

These Ten Brilliant Portraits Illuminate Ocean Creatures' Nighttime Antics

Blackwater photographer Steven Kovacs takes spectacular shots of marine animals, helping scientists study tiny larval fish

Covid-19 lockdowns had all kinds of effects on wild populations, helping some and hindering others. In one Mexican marine park, though, the sudden lack of tourists led to an increase in the density and diversity of marine species.

During Covid-19 Lockdowns, Fish Flourished in This Park

In the absence of tourists, the animals increased within Mexico’s Cabo Pulmo National Park

Electric eels can discharge up to 860 volts of electricity.

Eels Can Genetically Modify Nearby Fish With Their Electrical Pulses

In laboratory experiments, gene transfer occurred in 5 percent of zebrafish larvae that were near eels when they discharged electricity

A 14-inch goldfish (Carassius auratus) pulled from the Niagara River

Giant Goldfish Are Bad News for the Great Lakes

Researchers are tracking invasive goldfish—which, often, were once kept as pets—in Lake Ontario to determine how best to manage them

German researchers tested dolphins' ability to detect electric fields.

Bottlenose Dolphins May Have an Electric Sense, Study Finds

Dimples called vibrissal pits on the beaks of the mammals can perceive electricity and might help with hunting and navigation

Atlantic bluefin tuna circle a holding pen near Malta. The Mediterranean Sea and the Gulf of Mexico were long thought to be the only locales where the massively valuable fish spawns.

Bluefin Tuna Get Busy Off North Carolina

The extremely valuable fish likely spawn in a patch of the Atlantic Ocean called the Slope Sea

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

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