HomeFish encyclopediaRay-finned fishesPricklefishes, Bigscales and GibberfishesBigscale fishes or ridgeheadsTwospine bigscale Twospine bigscale (Scopelogadus mizolepis bispinosus) Scientific name: Scopelogadus mizolepis bispinosus Gilbert, 1915 The Twospine bigscale (Scopelogadus mizolepis bispinosus) is a marine fish of the family Melamphaidae. Native range: Eastern Pacific, British Columbia, Canada to Chile. South China Sea. BiologyDorsal spines (total): 2; Dorsal soft rays (total): 10-12; Anal spines: 1; Anal soft rays: 7 - 9; Vertebrae: 24 - 27. Branchiostegal rays: 8.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameScopelogadus mizolepis bispinosusFamilyMelamphaidae (Bigscale fishes or ridgeheads)OrderStephanoberyciformes (Pricklefishes, Bigscales and Gibberfishes)ClassActinopterygii (Ray-finned fishes)Maximum length11.0Depth range200–4000 m (656–13123 ft)EnvironmentMarine; bathypelagic; depth range 200 - 4000 mClimateDeep-waterDistributionEastern Pacific: British Columbia, Canada to Chile. South China Sea.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: of no interest SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026