HomeFish encyclopediaRay-finned fishesFlatfishesAmerican solesBrown sole Brown sole (Achirus klunzingeri) Scientific name: Achirus klunzingeri Steindachner, 1880 The Brown sole (Achirus klunzingeri) is a marine fish of the family Achiridae. Native range: Eastern Central Pacific, Costa Rica to Ecuador. BiologyFound over shallow sandy and muddy bottoms.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameAchirus klunzingeriFamilyAchiridae (American soles)OrderPleuronectiformes (Flatfishes)ClassActinopterygii (Ray-finned fishes)Maximum length23.0Depth range14–40 m (46–131 ft)EnvironmentMarine; demersal; depth range 14 - 40 mClimateTropicalDistributionEastern Central Pacific: Costa Rica to Ecuador.Conservation status (IUCN)Least Concern (LC)Threat 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