Mimicry
Cleaner fish are the allies of many other species, which allow them to eat their parasites and dead skin. Some allow the cleaner to go inside their mouth to hunt these parasites. One species of cleaner, the bluestreak cleaner wrasse (Labroides dimidiatus), shown to the right cleaning a grouper, lives in coral reefs in the Indian and Pacific Oceans. It is recognized by other fish who allow it to clean them.