HomeFish encyclopediaRay-finned fishesLightfishes and DragonfishesBristlemouthsTan bristlemouth Tan bristlemouth (Cyclothone pallida) Scientific name: Cyclothone pallida Brauer, 1902 The Tan bristlemouth (Cyclothone pallida) is a marine fish of the family Gonostomatidae. Native range: Atlantic, Indian and Pacific, in tropical to temperate waters. Southern Ocean: Indian Ocean sector south of Australia. South China Sea. BiologyMeso- to bathypelagic. Oceanic, precise depth range dependent upon developmental stage, latitude, season. Does not exhibit diel vertical migrations. Lipid content is 2.3 % in fresh body weight and wax ester is 34.0 % in total lipids.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameCyclothone pallidaFamilyGonostomatidae (Bristlemouths)OrderStomiiformes (Lightfishes and Dragonfishes)ClassActinopterygii (Ray-finned fishes)Maximum length4.8Depth range16–4663 m (52–15299 ft)EnvironmentMarine; bathypelagic; depth range 16 - 4663 m, usually 600 - 1800 mClimateDeep-waterDistributionAtlantic, Indian and Pacific: in tropical to temperate waters. Southern Ocean: Indian Ocean sector south of Australia. South China Sea.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: of no interestResilienceMedium, minimum population doubling time 1.4 - 4.4 years (tm=3.5) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026