HomeFish encyclopediaRay-finned fishesFlatfishesAmerican solesMazatlan sole Mazatlan sole (Achirus mazatlanus) Scientific name: Achirus mazatlanus Steindachner, 1869 The Mazatlan sole (Achirus mazatlanus) is a freshwater fish of the family Achiridae. Native range: Eastern Pacific, Baja California, Mexico to Puerto Pizarro, Peru. BiologyCommon in coastal waters less than 20 m depth and enters coastal lagoons and fresh water. Feeds on crustaceans, small fishes, polychaetes, and occasionally detritus. Marketed fresh. Benthic species that inhabits coastal waters less than 20m deep. May enter estuaries and freshwater.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameAchirus mazatlanusFamilyAchiridae (American soles)OrderPleuronectiformes (Flatfishes)ClassActinopterygii (Ray-finned fishes)Maximum length20.0Common length15.0Depth range1–20 m (3–66 ft)EnvironmentMarine; freshwater; brackish; demersal; amphidromous; depth range 1 - 20 m, usually ? - 20 mClimateTropicalDistributionEastern Pacific: Baja California, Mexico to Puerto Pizarro, Peru.Conservation status (IUCN)Least Concern (LC)Threat to humansHarmlessUsesFisheries: minor commercialResilienceHigh, minimum population doubling time less than 15 months (k >0.30) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026