HomeFish encyclopediaRay-finned fishesCharacinsPencilfishesSpotstripe pencilfish Spotstripe pencilfish (Nannostomus britskii) Scientific name: Nannostomus britskii Weitzman, 1978 The Spotstripe pencilfish (Nannostomus britskii) is a freshwater fish of the family Lebiasinidae. Native range: South America, Known from two localities in Brazil, the type locality and Aripuana River, Castanhal Island, Amazonas, Brazil. Species factsScientific nameNannostomus britskiiFamilyLebiasinidae (Pencilfishes)OrderCharaciformes (Characins)ClassActinopterygii (Ray-finned fishes)Maximum length2.4EnvironmentFreshwater; benthopelagicClimateTropicalDistributionSouth America: Known from two localities in Brazil, the type locality and Aripuana River, Castanhal Island, Amazonas, Brazil.Conservation status (IUCN)Not EvaluatedThreat to humansHarmless SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026