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While many species of the Stomiidae exhibit sexual dimorphism in the form of the size of the body and postorbital photophore, species of the genus Idiacanthus are the most extreme examples. The paedomorphic male is reminiscent of the dwarfted males of the lophiiform suborder Ceratioidei, the deep-sea anglerfishes.

As are most species of the family, I. fasciola is most likely a diel vertical migrator and predator of other mesopelagic fishes


Creative Commons Attribution Non Commercial 3.0 (CC BY-NC 3.0)

© Kenaley, Christopher

Source: Deep-sea Fishes of the World

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