Cartão Bluestreak Cleaner Wrasse (Labroides dimidiatus)

The Bluestreak cleaner wrasse (Labroides dimidiatus) is a fascinating little fish that cleans parasites and dead skin off larger fish. These tiny wrasse hang out at their cleaning stations, and attends to a steady procession of larger fish. They're all born female, with the largest wrasse in the area becoming male.