A conservation educator caught a record-breaking alligator gar in a bayou near Houston.
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.
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.
Scientists surveying the Detroit River caught a monstrous sturgeon weighing 240 pounds (109 kilograms) and measuring 6 feet 10 inches (2.1 meters) in length.
A dead "river monster" from the Amazon was discovered in Florida, leading to concerns that the fish might become an invasive species there.
Scientists recently captured video documenting the first reported instance of a fish preying on a newly-hatched baby bird, in a flooded nest in coastal Georgia.
Happy 16th birthday to Mikko the grouper, a popular aquarium fish in Finland who missed his human visitors during the COVID-19 shutdown.
Digital models of a fish skull revealed a parasitic stowaway inside its mouth: a "tongue biter" isopod that consumed and then replaced the fish's tongue.
Scientists have identified the larvae of one of the world's biggest fishes — the bump-head sunfish (Mola alexandrini) — and the youngster is ridiculously tiny.