This small, fast-moving, seven-inch-long fish only occurs in Hawai‘i and is rarely seen by divers. The juvenile female is red, black and white, and is usually seen on shallow reefs in groups of ...

There is the Psychedelic Wrasse (Anampses chryso-cephalus); Hawaiian Hogfish (Bodianus albotaeniatus); Flame Wrasse (Cirrhilabrus jordani); Old Woman Wrasse (Thalassoma ballieui), also known as ...

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 ...

An Osaka Metropolitan University-led team has demonstrated that bluestreak cleaner wrasse (Labroides dimidiatus) check their body size in a mirror before choosing whether to attack fish that are ...

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.

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