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Fish

Mature adults have just one verticle stripe behind their eyes.

These Clownfish Lose Their Baby Stripes in Response to Peer Pressure, New Research Suggests

Tomato clownfish perform a dramatic underwater wardrobe change based on the social dynamics of their environment

Dealing with centuries of darkness and eye parasites doesn't seem to affect Greenland sharks' vision.

Greenland Sharks Can Survive for Centuries—and Maintain Long-Lasting Vision, Despite Living in the Dark

The long-living sharks aren’t as blind as once thought and have DNA repair mechanisms that may help prevent their vision from degrading, a study suggests

Kiyoshi Kimura, known as the "Tuna King," poses with the record-breaking bluefin tuna.

See the Record-Breaking Bluefin Tuna the Size of a Grizzly Bear That Sold for $3.2 Million at a Tokyo Fish Market

The 535-pound fish, purchased by Japan’s self-proclaimed “Tuna King,” was sliced and shipped to sushi restaurants across the country

Three-dimensional reconstructions of the rockhead poacher's insides hint that the fish may beat its cranial pit like a drum

Cool Finds

This Bizarre Fish Has a Hole in Its Head. The Creature Might Use It Like a Drum to Rock Out

The rockhead, or deep-pitted, poacher may use its ribs to beat the inside of its head cavity to communicate with other creatures, according to a new study

Strange fossils reveal that predatory fish with a wide array of dental setups once stalked prehistoric waters.

Sharklike Fish With Weird, Buzz-Saw Jaws Sliced Through the Seas, Then Vanished. Now, Paleontologists Are Unraveling Their Secrets

These “total monsters of fishes” are extinct today, though new clues about their lives come from CT scans and their closest living relatives: the big-eyed ratfish of the deep sea

Orcas and dolphins might hang out together off the coast of British Columbia to hunt for food as a team, new research suggests.

Watch These Orcas Follow Dolphins to Snag a Salmon Feast. It Might Be the First Evidence of These Species Working Together

Off the coast of British Columbia, killer whales are tailing dolphins, and both seem to be rewarded with fishy meals. But not everyone is convinced it’s teamwork—and the behavior may hint at other ocean stressors

Smithsonian magazine's picks for best photography books of 2025 include Birds of a Feather, Blue Sun and Trembling Earth.

The Best Books of 2025

The Ten Best Photography Books of 2025

Our favorite titles this year invite readers to take in the beauty of nature and our cultural rituals

A Currier & Ives print, published in the mid- to late 19th century, depicts Crow’s Nest, a mountain along the Hudson’s west bank.

The History of America Flows Through the Hudson River, and the Country’s Aquatic Superhighway Is on the Rebound

The bucolic river is famous for reversing its current a few times each day. Now, an ongoing cleanup effort is reversing decades of industrial contamination

Remoras hitch a ride on a humpback whale.

Watch Suckerfish Hitch a Wild Ride on Humpback Whales in Rare Video Footage

Suckerfish—also known as remoras—are harmless, but the whales didn’t seem to be fans of their hitchhiking

While seaching for Ernest Shackleton's lost ship Endurance in 2019, researchers stumbled across clusters of indentations on the seafloor.

Researchers Found Hundreds of Mysterious Dimples on the Seafloor Near Antarctica. Now They Know What Creature Made Them

The indentations are nests of fish called yellowfin notie, and they are not randomly scattered—rather, they appear to have been arranged in distinct patterns

The orcas went after the juvenile great white sharks’ livers, which are rich in nutrients and high in calories. Here, an orca swims alongside a wounded shark.

Orcas in Mexico Have Learned to Attack Young Great White Sharks—by Flipping Them Upside Down and Eating Their Livers

Researchers captured the novel behavior on video in the Gulf of California, recording three separate takedowns across two hunts carried out by members of the Moctezuma pod

Gloria Acevedo, a diver with the Sirenas de Oriente in Mexico, removes a fishing line from coral near Cozumel Island.

‘Ghost Gear,’ or Abandoned Fishing Equipment, Is Haunting the Oceans. Here’s How Conservationists Are Fighting Back

Discarded nets, lines and traps are a hazard to marine life and ecosystems around the world, but pioneering programs are tackling the problem creatively through education, prevention, ocean cleanups and recycling

A close-up of a gum leaf skeletonizer caterpillar, also known as a "Mad Hatterpillar" because of its distinctive stacked head capsules, left behind with every molt. The photo won the invertebrate behavior category.

See 15 Wondrous Winning Images From the 2025 Wildlife Photographer of the Year Awards

The eye-catching wildlife photos highlight both the beauty and the harsh realities of nature

A gold mining operation in Peru

Study Finds High Levels of Mercury in Hair Samples From Indigenous Women in Peru and Nicaragua

Small-scale gold mining in the area releases mercury into the environment, where it can make its way into fish and, in turn, humans

A dusky shark swims in the Mediterranean Sea off the coast of Hadera, Israel, where dusky sharks and sandbar sharks tend to gather.

Why Do Sharks Go Into Feeding Frenzies? A Case Study of a Recent, Unusual Attack on a Human Looks for Answers

After multiple dusky sharks killed a swimmer off Israel’s coast this year, scientists investigated what might have triggered the attack in hopes of preventing similar incidents

New research suggests that the Salmon River in northwest Alaska is full of toxic metals.

Why Is This Remote and Rugged River in Alaska Turning Orange?

New research suggests the Salmon River is full of toxic metals that are likely harming fish and other aquatic creatures

A sea lamprey shows off its nightmarish mouth.

This Invasive Vampire Fish Is Helping Researchers Understand the Human Nervous System in Jaw-Dropping Ways

The sea lamprey looks like it’s from another planet, but this ancient creature has a surprising amount in common with humans

This event marks the first time the leopard shark (Stegostoma tigrinum) has been documented mating in the wild.

Rare Trio of Leopard Sharks Spotted Mating in the Wild for the First Time, and a Snorkeling Scientist Captured a Video

Conservationists say the unexpected observation could inform efforts to protect or reintroduce leopard sharks, an endangered species

According to new research, the Chicago River has become significantly cleaner and healthier in recent decades. 

Fish Are Spawning in the Chicago River, Another Sign the Once-Contaminated Waterway Is Rebounding

A new study suggests at least 24 species of fish are reproducing in the urban river, adding to the evidence that it is getting cleaner and healthier

Located nearly 60 feet below the surface, the statue is cleaned every year.

See How Divers Clean This Statue of Jesus Christ Submerged Nearly 60 Feet Below the Surface of the Mediterranean

Located off the coast of northern Italy, “Christ of the Abyss” was installed in 1954 to commemorate lives lost at sea. The statue receives a routine cleaning every year

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