See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. Before squaring up for a fight, some fish check themselves out in the ...

Fish intelligence is being re-evaluated after cleaner wrasse passed mirror tests. These small tropical fish showed self-recognition by inspecting marks on their bodies. This discovery challenges ...

Bluestreak cleaner wrasse are small, territorial fish that aggressively fend off intruders. But when they have access to a mirror, the fish size themselves up before deciding whether or not to fight.

Fish might not be the brainiest of animals, but new research suggests that some of these finned creatures can recognize their own faces in a mirror — an indication of self-awareness that has so far ...

Cleaner wrasse picking parasites of a Fusilier fish. Underwater Macro Image taken scuba diving in Raja Ampat, Indonesia.© SergeUWPhoto/Shutterstock.com Cleaner ...

Cleaner wrasse perform a cleaning service for coral reef fish -- namely eating parasites off their customer's skin. However, what the females of some species actually want is to lure in clients and ...

Scientists often warn against anthropomorphism — the attribution of human characteristics to animals or even nonliving things. But it’s hard to resist the charm of Labroides dimidiatus, a species of ...

Add Yahoo as a preferred source to see more of our stories on Google. Cleaner wrasse picking parasites of a Fusilier fish. Underwater Macro Image taken scuba diving ...