Fish (Page 2)

Whether stream or ocean, the diversity and science of fish goes deep. This is the latest on the science of swimmers.

Latest in Fish

Smelt fish under ice. Fish spawning in river. Pacific smelt

Fake fish blood may save your ice cream from freezer burn

Three leopard sharks mating in water

First-ever footage of leopard shark sex shows an unexpected trio

Red Hind Grouper in coral reef

Eavesdropping on grunting groupers reveals how the fish communicate

a large, flat head catfish with an open mouth

Monster catfish and its creepy smile invade PA rivers

By Laura Baisas

a fish with bright blue markings swim in a tank

A rainbow of fish dazzles in New Jersey

By Laura Baisas

a lake trout looking up from the water

Meet Mary Catherine, the Great Lakes’ oldest-known trout

By Laura Baisas

Norselaspis illustration

A googly-eyed fish could upend evolutionary history

several small fish with colorful organa and blue scales

Orange male guppies are hornier

By Laura Baisas

small fish in a net being rescued

After a devastating wildfire, rescued fish make a triumphant return to Malibu

By Margherita Bassi

a leopad seal with its mouth wide open

15 riveting images from the 2025 UN World Oceans Day Photo Competition

By Popular Science Team

a weedy seadragon swimming. they have long snouts and raised backs

Weedy seadragons in the running for nature’s best dads

By Margherita Bassi

Lab grown salmon on sushi rice on a plate

FDA approves lab-grown salmon

Mako shark swimming with orange octopus on its back

Shark’s ‘mystery hat’ turns out to be a giant octopus

a man on a boat holds a large orange pet goldfish

Please stop releasing pet goldfish into the wild

By Laura Baisas

a dead fish being dragged on artificial turf

Dragging dead fish around reveals super power of mucus

By Ethan Freedman

a close up of a diver wearing a mask and a fish swimming towards him

Wild fish can recognize human divers

By Laura Baisas

a penguin swimming underwater in straight line making it look like it's flying

15 splashy and stunning underwater wildlife images

By Popular Science Team

a small brown fish swimming in a tank

These fish can mate 19 times per day

By Laura Baisas

Chaunacops fish with 2024 Look Back article headline

Ghost ships to ghost sharks: 10 wildest underwater discoveries of 2024

Striated frogfish (Antennarius striatus), also known as the hairy frogfish.

Anglerfish use ‘extremely rare’ mechanism to control their lures

waves in a deep cavern

Earthquake off northern California shook the water in Devils Hole, 500 miles away

By Laura Baisas

The anglerfish species Lophius piscatorius.

Anglerfish are so much more than just their dangly bioluminescent lures

By Laura Baisas

a more colorful dominant male fish next to a more muted subordinate fish

Stress is warping these fish brains

By Laura Baisas

a scan of a zebrafish with its eye highlighted in green and other parts of its anatomy stained red and blue

Mapping the shifting gaze of ‘fishlets’

By Laura Baisas

two leopards fighting in dirt

14 dramatic moments from the 2024 Nature’s Best Photo Awards

By Popular Science Team

The ‘wild’ salmon on your menu might not be wild

The ‘wild’ salmon on your menu might not be wild

By Lauren Leffer

Jumping carp disrupt recreational boating and other water-based activities.

Chicago’s dirty water may be keeping invasive species at bay

By Lauren Leffer

As the tide of invasive Pacific pink salmon threatens to overwhelm Norway’s rivers, the locals—above on the Vestre Jakobselv—net or trap as many possible before the fish spawn and die, potentially changing the ecology of the region.

Where the rivers run pink

By Jude Isabella/Hakai Magazine

a sea robin fish with wide pectoral fins and six crab-like legs

This fish has 6 legs that act like tongues

By Laura Baisas

a spook-fish with a narrow snout and large pectoral fins

Boo! New species of ghost shark uncovered in New Zealand

By Laura Baisas

a red fish with a grumpy expression and large teeth

Seriously grumpy-faced fish discovered in Red Sea

By Laura Baisas

an illustration of a long gray coelacanth swimming in its native habitat

The ‘living fossil’ that thrived during a mass extinction

By Laura Baisas

an x-ray image of an eel escaping from a fish's stomach

Watch an eel escape a fish’s stomach through its gills

By Laura Baisas

This eyeless cavefish grows extra taste buds on its head

A transparent zebrafish in a tank in a laboratory at the Pasteur Institute in Paris on June 20, 2023.

Zebrafish regenerate their spinal cords in a surprising way

By Laura Baisas

A sampling of haplochromine cichlid fish.

One fish, two fish, 3,000 fish …

By Curtis Abraham / Knowable Magazine

a school of yellow and white swim near a reef

Fish swimming together fare better in turbulent waters

By Laura Baisas

Why do we send so many fish to space?

By Briley Lewis

Common cuttlefish

Cuttlefish tentacles and origami inspired a new robotic claw

a small, blue fish called the Devils Hole pupfish swims in a hole

Devils Hole pupfish are clawing their way back from the brink of extinction

By Laura Baisas

a spike-toothed salmon fossil with its mouth open

This 400-pound prehistoric salmon had tusks like a warthog

By Laura Baisas

a fish robot in an aquarium

Get ready for the robotic fish revolution

By Annie Roth / Hakai Magazine

A silver gar fish with a long snout.

Meet the new king of the ‘living fossils’

By Laura Baisas

A small translucent fish with its organs visible swims in a tank.

This tiny fish is louder than an airplane taking off

By Laura Baisas

An orange Chaunacops fish swimming in the waters of Chile’s Nazca-Desventuradas Marine Park.

See the strange new species discovered near Chile—with the help of a deep-diving sea robot

By Laura Baisas

Anchovy sex is a force of nature

Anchovy sex is a force of nature

By Christina Couch / Hakai Magazine

Three common clownfish with orange coloring and white stripes swimming in a sea anemone.

Can clownfish count?

By Laura Baisas

Check out some of the past year’s best close-up photography

Check out some of the past year’s best close-up photography

Salmon fishing in Alaska, fisherman in gloves handling fish in net on a boat

As salmon disappear, a battle over Alaska Native fishing rights heats up

By Max Graham/Grist

Lessons from Lake Tanganyika’s scale eating fish

Lessons from Lake Tanganyika’s scale eating fish

By Jeffrey McKinnon / MIT Press Reader

‘Forever chemicals’ found in freshwater fish, yet most states don’t warn residents

‘Forever chemicals’ found in freshwater fish, yet most states don’t warn residents

By Hannah Norman / KFF Health News

1-guilla eel robot without casing

Watch this eel robot effortlessly glide underwater

All the fish we cannot see

All the fish we cannot see

By Moira Donovan / Hakai Magazine

Smallmouth buffalofish caught at Apache Lake, Arizone

Century-old buffalofish are still living in their prime

An artist's illustration of an early lamprey's teeth and sucker. The Jurassic lampreys Yanliaomyzon had a feeding apparatus that surprisingly resembles that of the pouched lampreys. It foreshadows the ancestral flesh-eating habit of present day. lampreys.

Giant prehistoric lamprey likely sucked blood—and ate flesh

By Laura Baisas

A long torpedo-shaped fish swims among green plants. Knifefish like the black ghost knifefish are known for their shimmying motions and electrical pulses. and live in freshwater lakes and rivers in Central and South America.

Why electric knifefish ‘shimmy’

By Laura Baisas

AlgaRay robot floating atop water in Antigua

This seafaring robot ‘eats’ stinky seaweed and dumps it in deep water

Smallmouth bass.

It’s not too late to stop a bass invasion in the Colorado River

By Ben Goldfarb / High Country News

Blue bins of fish and other seafood caught near the Fukushima nuclear plant in Japan

This nuclear byproduct is fueling debate over Fukushima’s seafood

A Caribbean box jellyfish on a black background. It has a round, bell shaped body, with about 11 visible tentacles. It also has four parallel brain-like structures with roughly 1,000 nerve cells in each.

These 24-eyed jellyfish learn from their mistakes

By Laura Baisas

Manatee in a patch of sunlight

Sea the beauty of the world’s oceans with these 12 award-worthy photos

By Popular Science Team

An Australian lungfish named Methuselah swims in a tank at the Steinhart Aquarium. The fish has a flat snout, olive-green scales, and a long torpedo-shaped body.

World’s oldest living aquarium fish could be 100 years young

By Laura Baisas

Plastic fishing gear brings in a better catch, but there’s a big tradeoff

Plastic fishing gear brings in a better catch, but there’s a big tradeoff

By Alastair Bland/Hakai Magazine

Revo Foods 3D-printed salmon

The world’s first 3D-printed salmon is hitting store shelves, and it looks kind of good