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

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 ...

Jess Thomson is a Newsweek Science Reporter based in London UK. Her focus is reporting on science, technology and healthcare. She has covered weird animal behavior, space news and the impacts of ...

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 ...

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 ...

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 ...

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 ...

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 ...

A little fish just passed a classic scientific test of self-awareness by recognizing itself in a mirror, scientists have announced. The cleaner wrasse fish, which measures around 10cm in length, was ...

It’s not easy for fish to clean themselves, without limbs or digits to scrub those hard-to-reach places. Fortunately for them, coral reefs come with cleaning stations. At particular sites, an itchy ...