HomeFish encyclopediaRay-finned fishesLightfishes and DragonfishesBristlemouthsBenttooth bristlemouth Benttooth bristlemouth (Cyclothone acclinidens) Scientific name: Cyclothone acclinidens Garman, 1899 The Benttooth bristlemouth (Cyclothone acclinidens) is a marine fish of the family Gonostomatidae. BiologyDorsal spines (total): 0; Dorsal soft rays (total): 13-15; Anal spines: 0; Anal soft rays: 18 - 20; Vertebrae: 30 - 32. Light to dark brown or grey-brown in color. Branchiostegal rays: 13-15.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameCyclothone acclinidensFamilyGonostomatidae (Bristlemouths)OrderStomiiformes (Lightfishes and Dragonfishes)ClassActinopterygii (Ray-finned fishes)Maximum length3.6Depth range0–4416 m (0–14488 ft)EnvironmentMarine; bathypelagic; oceanodromous; depth range 0 - 4416 m, usually 300 - 1500 mClimateDeep-waterDistributionAtlantic, Indian and Pacific: in tropical and subtropical waters. Southern Ocean: a single specimen recorded near Bouvet Island (56?30'S, 14?29'E). Eastern Pacific: California Current region. South China Sea.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: of no interestResilienceHigh, minimum population doubling time less than 15 months (K=0.8) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026