HomeFish encyclopediaRay-finned fishesCharacinsCharacinsTetra Tetra (Triportheus paranensis) Scientific name: Triportheus paranensis G?nther, 1874 The Tetra (Triportheus paranensis) is a freshwater fish of the family Characidae. Native range: South America, La Plata and Paran?-Paraguay River basin. Species factsScientific nameTriportheus paranensisFamilyCharacidae (Characins)OrderCharaciformes (Characins)ClassActinopterygii (Ray-finned fishes)Maximum length19.0EnvironmentFreshwater; benthopelagicClimateTropicalDistributionSouth America: La Plata and Paran?-Paraguay River basin.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