Researchers stumbled across a bizarre species of blind cave fish with a mysterious, horn-like structure protruding from its head and a lack of scales or pigmentation.
Find out everything there is to know about fish and stay updated on the latest news with the comprehensive articles, interactive features and fish pictures at LiveScience.com. Learn more about these fascinating creatures as scientists continue to make amazing discoveries about fish.
Jewel damselfish living on coral reefs surrounding rat-infested tropical islands have become less territorial and less aggressive due to a bizarre ecological link between the two species: bird poop.
Mouthbrooding fish under stress may sometimes resort to cannibalism and eat their young. Scientists' discovery of the behavior was "a complete accident."
A new study has revealed that a 6,000-pound giant sunfish found dead in the Azores is the heaviest bony fish ever recorded.
An unusual surge in anchovy populations has led to the fish raining down on San Francisco. Here's why.
For millions of years, megalodon was the top predator in marine ecosystems. Then great whites came along and ruined everything.
Sheepshead fish are predominantly marine fish with human-like teeth that live along the eastern coastline of North America and South America.
Scientists exploring the depths of Monterey Bay unexpectedly encountered a rare and unique species of dragonfish.
A new study has found that, after being misidentified for decades, a stunning rainbow fish is actually a brand-new species.
Hearts have become iconic symbols of Valentine's Day, but when it comes to hearts in the real world, one size doesn't fit all — particularly in the animal kingdom.
Fishers in the Netherlands caught an enormous, bright-yellow catfish recently. The species is common, but the yellow body may be the result of a genetic disorder.
An angler fishing in Tampa Bay was surprised to reel in an unusual fish that looked just like a flour tortilla.
A 100-pound opah fish, also known as a moonfish, was recently found washed up on a beach in Oregon hundreds of miles from its normal habitat.
A detailed look at coelacanths' scales reveals that this ancient lineage of fish may live to be 100 years old.
Most marine creatures get their meals in the water, but snowflake moray eels have a strange adaptation that lets them grab and swallow prey on land, too.
Madagascar may be the ancestral home of coelacanths, 'living fossil' fish once thought to have gone extinct.