A finger-length fish has reignited a long-running debate about self-awareness, cognition and how much we’ve underestimated ...

Before squaring up for a fight, some fish check themselves out in the mirror to make sure they're big enough. This strange behavior was seen in bluestreak cleaner wrasse (Labroides dimidiatus), who ...

Controversial new research shows that a tiny, unsuspecting species of fish can pass a test that’s widely considered the gold standard of intelligence. As far as we can tell, only a few of the most ...

A newly updated study has found that the blue streak cleaner wrasse, Labroides dimidiatus, may be capable of recognizing themselves in reflections and photos based on mental self-images. Researchers ...

Cooperative behaviours, which often involve an exchange of goods or services between two types of 'trader', have intrigued researchers for decades. The bluestreak cleaner wrasse fish (Labroides ...

Do you know that the fish here in Hawai‘i go to the dentist on a regular basis to have their teeth cleaned? From large sharks to young yellow tangs, they all get free dental work, but they must go to ...

Before deciding whether or not to fight another fish, cleaner wrasse check their own reflection in a mirror and size themselves up. First, Taiga Kobayashi at Osaka Metropolitan University in Japan and ...

New findings suggest bluestreak cleaner wrasse understand how their body size stacks up against a rival Sarah Kuta Daily Correspondent Bluestreak cleaner wrasse are small, territorial fish that ...

Feb. 8 (UPI) --The cleaner wrasse, Labroides dimidiatus, a small saltwater fish, can recognize itself in the mirror. When scientists present the colorful reef fish with a reflection of itself, the ...