HomeFish encyclopediaRay-finned fishesCarpsMinnows or carpsLongfin dace Longfin dace (Agosia chrysogaster) Scientific name: Agosia chrysogaster Girard, 1856 The Longfin dace (Agosia chrysogaster) is a freshwater fish of the family Cyprinidae. BiologyInhabits shallow sandy and rocky runs, flowing pools of creeks and small to medium rivers. Often occurs near cover.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameAgosia chrysogasterFamilyCyprinidae (Minnows or carps)OrderCypriniformes (Carps)ClassActinopterygii (Ray-finned fishes)Maximum length10.0EnvironmentFreshwater; demersalClimateSubtropicalDistributionNorth America: lower Colorado River drainage (primarily Gila and Bill William River systems) in New Mexico and Arizona, USA and south through southern Arizona and Pacific drainages of western Mexico.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