HomeFish encyclopediaRay-finned fishesCharacinsCharacinsBlackedge tetra Blackedge tetra (Tyttocharax madeirae) Scientific name: Tyttocharax madeirae Fowler, 1913 The Blackedge tetra (Tyttocharax madeirae) is a freshwater fish of the family Characidae. Native range: South America, Tributaries of lower and middle Amazon River basin. Species factsScientific nameTyttocharax madeiraeFamilyCharacidae (Characins)OrderCharaciformes (Characins)ClassActinopterygii (Ray-finned fishes)Maximum length1.7EnvironmentFreshwater; pelagicClimateTropicalDistributionSouth America: Tributaries of lower and middle Amazon 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