Bluestriped fangblenny

Bluestriped fangblennies (Plagiotremus rhinorhynchos) mimic cleaner wrasses to enable them to loiter at cleaning stations and dupe clients waiting to be cleaned. The fangblenny does no cleaning, but bites the host fish and leaves. Its opioid-containing venom helps it escape, as it gives a pain-free bite which also dulls the host's reactions.

Bluestriped fangblennies (Plagiotremus rhinorhynchos) mimic cleaner wrasses to enable them to loiter at cleaning stations and dupe clients waiting to be cleaned. The fangblenny does no cleaning, but bites the host fish and leaves. Its opioid-containing venom helps it escape, as it gives a pain-free bite which also dulls the host's reactions.