The decoy scorpionfish (Iracundus signifer) is a species of marine ray-finned fish belonging to the family Scorpaenidae, the scorpionfishes. It is native to the Western Indian and Pacific oceans. A non-migratory species, I. signifer can be observed in close association with coral reefs at depths of from 10 to 70 metres (33 to 230 ft). This species grows to a length of 13 centimetres (5.1 in) TL. This species is the only known member of its genus and can be distinguished by its unique prey-luring behavior.