HomeFish encyclopediaRay-finned fishesCharacinsCharacinsSilverdollar Silverdollar (Metynnis polystictus) Scientific name: Metynnis polystictus Zarske & G?ry, 2008 The Silverdollar (Metynnis polystictus) is a freshwater fish of the family Characidae. Native range: South America, Brazil. R?o Xingu. Species factsScientific nameMetynnis polystictusFamilyCharacidae (Characins)OrderCharaciformes (Characins)ClassActinopterygii (Ray-finned fishes)Maximum length16.7EnvironmentFreshwater; pelagicClimateTropicalDistributionSouth America: Brazil. R?o XinguConservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries:ResilienceHigh, 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