Mimicry
Its imposter, the mimetic sabre-toothed blenny (Aspidontus taeniatus), also lives in the Indian Ocean. It not only looks like the wrasse in terms of size and color, but even mimics the cleaner's 'dance'. After fooling its prey into letting its guard down, the blenny then bites it, tearing off a piece of its fin before fleeing the scene. Fish attacked in this manner soon learn to distinguish mimic from model, but because the similarity is close they become much more cautious of the model as well. Due to victim's ability to discriminate between foe and helper, the blennies have evolved close similarity, right down to the regional level.