Chaenophryne longiceps, the longhead dreamer or smooth-head dreamer, is a species of marine ray-finned fish belonging to the family Oneirodidae, the dreamers, a family of deep-sea anglerfishes. This predatory, deep-sea fish is found in tropical and subtropical oceans around the world. Like other deep-sea anglerfishes, it is sexually dimorphic with the metamorphosed females dwarfing the metamorphosed males, though the males are not sexual parasites.

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