HomeFish encyclopediaRay-finned fishesScorpionfishes and FlatheadsVelvetfishesRoughskin scorpionfish Roughskin scorpionfish (Cocotropus monacanthus) Scientific name: Cocotropus monacanthus Gilchrist, 1906 The Roughskin scorpionfish (Cocotropus monacanthus) is a marine fish of the family Aploactinidae. Native range: Western Indian Ocean, off Natal, South Africa and off Tanzania. Likely to occur in Seychelles. BiologyDorsal spines (total): 12 - 13; Dorsal soft rays (total): 9-10; Anal spines: 1; Anal soft rays: 7 - 8; Vertebrae: 25 - 26Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameCocotropus monacanthusFamilyAploactinidae (Velvetfishes)OrderScorpaeniformes (Scorpionfishes and Flatheads)ClassActinopterygii (Ray-finned fishes)Maximum length3.8Depth range37–48 m (121–157 ft)EnvironmentMarine; demersal; depth range 37 - 48 mClimateTropicalDistributionWestern Indian Ocean: off Natal, South Africa and off Tanzania. Likely to occur in Seychelles.Conservation status (IUCN)Not EvaluatedThreat to humansHarmless SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026