A small coral reef fish can recognize itself in a mirror. This discovery challenges long-held ideas about animal intelligence.

Cleaner wrasse have revealed a remarkable new side of fish intelligence. Marked with fake parasites, they used mirrors to inspect and remove the spots—far faster than seen in earlier tests. Even more ...

A shrimp scrap drifted down the face of a mirror, and a small reef fish tracked it like it was watching a slow-motion ...

Learn how cleaner wrasse used a mirror and even dropped food to test their reflections, a behavior linked mostly to mammals.

US HOW PEOPLE CAME OUT TO SEE THE FISH. JUST AS THE SALMON ARE DRAWN TO SWIM UPSTREAM. PEOPLE ARE DRAWN TO WATCH THEM. PRETTY FASCINATING. COULD WATCH FOR HOURS. ARE THEY BIG OR WHAT? WOW. PEOPLE LIKE ...

Jamie Morgan, an aquatic biologist at Jacobs Solutions, left, sets up a fish trap with employees of the U.S. Environmental Protection Agency at Fish Trap Lake Park in Dallas on Jan. 30, 2024. The EPA ...

SLATE CREEK, Idaho — In an effort to minimize the spread of chronic wasting disease in wild game, Idaho Fish and Game (IDFG) will begin killing and testing deer in the Slate Creek area north of ...