HomeFish encyclopediaRay-finned fishesLightfishes and DragonfishesBristlemouthsShadow bristlemouth Shadow bristlemouth (Cyclothone parapallida) Scientific name: Cyclothone parapallida Badcock, 1982 The Shadow bristlemouth (Cyclothone parapallida) is a marine fish of the family Gonostomatidae. Species factsScientific nameCyclothone parapallidaFamilyGonostomatidae (Bristlemouths)OrderStomiiformes (Lightfishes and Dragonfishes)ClassActinopterygii (Ray-finned fishes)Maximum length6.7Depth range0–3140 m (0–10302 ft)EnvironmentMarine; bathypelagic; depth range 0 - 3140 m, usually 900 - 1250 mClimateDeep-waterDistributionAtlantic Ocean: Equatorial region, its northern limit appears to be around 25?N. Southwest Atlantic: Northeast Brazil. Western Central Pacific: Solomon and Coral seas.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceHigh, minimum population doubling time less than 15 months (Preliminary K or Fecundity.) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026