Fish

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

Latest in Fish

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

15 splashy and stunning underwater wildlife images

By Popular Science Team

a small brown fish swimming in a tank
Environment

These fish can mate 19 times per day

By Laura Baisas

Chaunacops fish with 2024 Look Back article headline
Science

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

By Andrew Paul

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

Anglerfish use ‘extremely rare’ mechanism to control their lures

By Andrew Paul

waves in a deep cavern
Environment

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

By Laura Baisas

The anglerfish species Lophius piscatorius.
Science

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
Environment

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
Science

Mapping the shifting gaze of ‘fishlets’

By Laura Baisas

two leopards fighting in dirt
Environment

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
Environment

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

By Lauren Leffer

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

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.
Environment

Where the rivers run pink

By Jude Isabella/Hakai Magazine

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

This fish has 6 legs that act like tongues

By Laura Baisas

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

Boo! New species of ghost shark uncovered in New Zealand

By Laura Baisas

a red fish with a grumpy expression and large teeth
Environment

Seriously grumpy-faced fish discovered in Red Sea

By Laura Baisas

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

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
Environment

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

By Laura Baisas

Blind cavefish
Science

This eyeless cavefish grows extra taste buds on its head

By Andrew Paul

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

Zebrafish regenerate their spinal cords in a surprising way

By Laura Baisas

A sampling of haplochromine cichlid fish.
Environment

One fish, two fish, 3,000 fish …

By Curtis Abraham / Knowable Magazine