HomeFish encyclopediaRay-finned fishesFlatfishesRighteye floundersRemo flounder Remo flounder (Oncopterus darwinii) Scientific name: Oncopterus darwinii Steindachner, 1874 The Remo flounder (Oncopterus darwinii) is a marine fish of the family Pleuronectidae. Native range: Southwest Atlantic, Santa Catarina, Brazil to Golfo de S?n Mat?as, Argentina. BiologyDorsal spines (total): 0; Dorsal soft rays (total): 59-67; Anal spines: 0; Anal soft rays: 41 - 46. Pectoral fin with 12 soft rays on ocular side, 11 on blind side. Strong spine anterior to anal fin, prominent in young specimens. Lateral line with a distinct curve above pectoral fin and with several transverse accessory branches. Pale brownish, covered with many small white spots; some larger white spots at upper and lower edges of body.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameOncopterus darwiniiFamilyPleuronectidae (Righteye flounders)OrderPleuronectiformes (Flatfishes)ClassActinopterygii (Ray-finned fishes)Maximum length30.4Common length25.0Depth range20–80 m (66–262 ft)EnvironmentMarine; demersal; depth range 20 - 80 mClimateSubtropicalDistributionSouthwest Atlantic: Santa Catarina, Brazil to Golfo de S?n Mat?as, Argentina.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: minor commercialResilienceMedium, minimum population doubling time 1.4 - 4.4 years (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