Fish

Baby fish swam in schools 50 million years ago, according to this remarkable fossil held in a Japanese museum.

What's the story behind reefs' mysterious "halos" of empty sand?

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.

Mary's species of fish never evolved to have sex or incubate live young. She did it anyway.

Teaser: A re-examination of the fossil record has produced a new theory of the super-fish's demise.

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.

Lingering traces of preserved hagfish goo hint at the lineage of this slimy creature.

The little sharks swim around inside their mom, switching between her multiple uteruses. When they get hungry they eat her unfertilized eggs.

Fish do it. So do jellyfish, starfish and sea cucumbers.

The little sea monster used its mouth full of scissor teeth to rip flesh from other fish.

A new species of swamp eel that tunnels through dirt will haunt your nightmares.

In a strange, underwater video, a black mass drifts toward the camera. It's made up of a dark, spherical blob up front and a long, thin tail in the back. And it wriggles.

Scientists observed the first-ever evidence of praying mantises hunting fish.

Remarkable footage shows the snot-textured fish hunting in the extreme pressures of their alien home environment.