HomeFish encyclopediaRay-finned fishesScorpionfishes and FlatheadsFlatheadsLarge-scale flathead Large-scale flathead (Onigocia oligolepis) Scientific name: Onigocia oligolepis Regan, 1908 The Large-scale flathead (Onigocia oligolepis) is a marine fish of the family Platycephalidae. BiologyDorsal spines (total): 9; Dorsal soft rays (total): 11-111; Anal spines: 0; Anal soft rays: 11. Pale tan in color, whitish below; back crossed by a broad dark band at spiny dorsal and 2-3 smaller dark bands posteriorly; prominent black blotch on pelvic fins.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameOnigocia oligolepisFamilyPlatycephalidae (Flatheads)OrderScorpaeniformes (Scorpionfishes and Flatheads)ClassActinopterygii (Ray-finned fishes)Maximum length10.0Depth range5–30 m (16–98 ft)EnvironmentMarine; reef-associated; depth range 5 - 30 mClimateTropicalDistributionIndo-West Pacific: three known specimens from Natal, South Africa; also from north and northwestern Australia, and possibly extending to western Papua New Guinea. Reported from Samoa.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceHigh, minimum population doubling time less than 15 months (Preliminary K or Fecundity.) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026