A mirror placed underwater creates a strange reaction from river fish that seem unsure what they are seeing. One fish, ...

Fish introduced to a mirror began to act strangely, swimming upside-down or spreading their fins. They also tried to scrape a mark from their throats. Reading time 5 minutes New research seems to ...

Add Yahoo as a preferred source to see more of our stories on Google. In this undated photo provided by researcher Alex Jordan in February 2019, a cleaner wrasse interacts with its reflection in a ...

This video works because the idea is so simple and the result is so strange. A mirror is lowered into the water, and fish ...

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 ...

A species of fish, the cleaner wrasse (Labroides dimidiatus), responds to its reflection and attempts to remove marks on its body during the mirror test--a method held as the gold standard for ...

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 ...