HomeFish encyclopediaRay-finned fishesCarpsMinnows or carpsManantial roundnose minnow Manantial roundnose minnow (Dionda argentosa) Scientific name: Dionda argentosa Girard, 1856 The Manantial roundnose minnow (Dionda argentosa) is a freshwater fish of the family Cyprinidae. Native range: North America, U.S.A. and Mexico. Species factsScientific nameDionda argentosaFamilyCyprinidae (Minnows or carps)OrderCypriniformes (Carps)ClassActinopterygii (Ray-finned fishes)Maximum length7.6EnvironmentFreshwater; benthopelagicClimateSubtropicalDistributionNorth America: U.S.A. and 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