Cleaner wrasse quickly learn to recognize themselves in mirrors, and take advantage of the information their reflection provides. They also experiment with the mirror in a way we might call playful, ...

A shrimp scrap drifted down the face of a mirror, and a small reef fish tracked it like it was watching a slow-motion experiment. The fish, a blue-streak cleaner wrasse, had carried the shrimp upward, ...

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 ...

Charlie has an undergraduate degree in Forensic Psychology and writes on topics from zoology and psychology to herpetology.View full profile Charlie has an undergraduate degree in Forensic Psychology ...

Researchers at Osaka Metropolitan University in Japan have discovered a previously undiscovered behavior in cleaner wrasse (Labroides dimidiatus). When presented with a mirror, the tiny fish not only ...

Damselfish have been discovered to disrupt "cleaning services" vital to the health of reefs, and climate change may mean this is only likely to get worse. The meal of choice for the Caribbean cleaner ...

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 ...

Sea lice attached to the skin of a wild salmon. Salmon farms have been plagued by parasitic sea lice (Lepeophtheirus salmonis) since they were first established in Norway in the 1960s. The small ...

Forbes contributors publish independent expert analyses and insights. I write about biodiversity and the hidden quirks of the natural world. For decades, self-awareness has been guarded as a very ...