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.
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 have identified the larvae of one of the world's biggest fishes — the bump-head sunfish (Mola alexandrini) — and the youngster is ridiculously tiny.
Hungarian scientists accidentally created a hybrid of a Russian sturgeon and an American paddlefish, leading to a long-nosed "sturddlefish" baby.
After snake eels are swallowed by bigger fish, they can burst out of their predators' stomachs ... to freedom? Not exactly.
Photos of a bright pink manta ray have gone viral after the Pepto-Bismol-colored creature was spotted swimming near Australia’s Great Barrier Reef.
The turbulent lower Congo River, home to hundreds of fish species, is not only Earth's deepest river; it also presents biologists with an intriguing window into evolution.
Scary portrayals of great whites in pop culture might lead some people to wonder if the world would be better off with no sharks at all.
Baby fish swam in schools 50 million years ago, according to this remarkable fossil held in a Japanese museum.
A fossil site in North Dakota preserves a unique snapshot of the minutes after an asteroid struck Earth around 66 million years ago.
What happened after the Cretaceous-ending asteroid struck Earth? A new fossil site may have answers.
A fish so mysterious that scientists named it the "hoodwinker" because it had eluded them for decades has washed ashore in California, thousands of miles from its home in the Southern Hemisphere.
Photographers from around the world competed to take home the top prizes in the 2019 Underwater Photographer of the Year contest.
As part of a drinking game, a 28-year-old man from the Netherlands attempted to swallow a living fish with some powerful natural defenses.