HomeFish encyclopediaRay-finned fishesPricklefishes, Bigscales and GibberfishesBigscale fishes or ridgeheadsRagged bigscale Ragged bigscale (Scopelogadus mizolepis mizolepis) Scientific name: Scopelogadus mizolepis mizolepis G?nther, 1878 The Ragged bigscale (Scopelogadus mizolepis mizolepis) is a marine fish of the family Melamphaidae. Native range: Indian and Atlantic, in tropical waters to 20-30?S. Western Pacific: Japan to Australia and New Zealand. Eastern Pacific: Chile. Species factsScientific nameScopelogadus mizolepis mizolepisFamilyMelamphaidae (Bigscale fishes or ridgeheads)OrderStephanoberyciformes (Pricklefishes, Bigscales and Gibberfishes)ClassActinopterygii (Ray-finned fishes)Maximum length9.4Depth range300–3385 m (984–11106 ft)EnvironmentMarine; bathypelagic; depth range 300 - 3385 mClimateDeep-waterDistributionIndian and Atlantic: in tropical waters to 20-30?S. Western Pacific: Japan to Australia and New Zealand. Eastern Pacific: Chile.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