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

Cleaner wrasse fish, the tiny reef dwellers that pick parasites off larger clients, behave more cooperatively when a potential customer is watching, according to experimental evidence published in ...

SUSAN SCOTT PHOTO A striped cleaner wrasse in Raiatea nibbles on Susan Scott’s leg. The wrasses’ customers seem to love the service, flocking to the wrasse cleaning stations usually held in an ...

A team of biologists at Osaka City University, working with a colleague from the University of Neuchâte, reports that a type of cleaner fish can pass the mirror test and then recognize itself in a ...

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 ...