HomeFish encyclopediaRay-finned fishesPerch-like fishDrums or croakersSan Francisco croaker San Francisco croaker (Pachyurus francisci) Scientific name: Pachyurus francisci Cuvier, 1830 The San Francisco croaker (Pachyurus francisci) is a freshwater fish of the family Sciaenidae. Native range: South America, Sao Francisco River basin in Brazil. Species factsScientific namePachyurus francisciFamilySciaenidae (Drums or croakers)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length29.7EnvironmentFreshwater; benthopelagic; potamodromousClimateTropicalDistributionSouth America: Sao Francisco River basin in Brazil.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: commercialResilienceHigh, 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