HomeFreshwater aquarium fishTetras & characinsThreeline tetra Threeline tetra (Neolebias trilineatus) Scientific name: Neolebias trilineatus Boulenger, 1899 The Threeline tetra (Neolebias trilineatus) is a freshwater fish of the family Distichodontidae. In the aquarium it needs water at 23–26°C (73–79°F). Native range: Africa, Middle and Lower Congo. Threeline tetra care at a glanceTemperature23–26°C (73–79°F) Species factsScientific nameNeolebias trilineatusFamilyDistichodontidaeOrderCharaciformes (Characins)ClassActinopterygii (Ray-finned fishes)Maximum length3.3EnvironmentFreshwater;; pH range: 6.2 - 7.2; dH range: ? - 15 pelagicClimateTropicalDistributionAfrica: Middle and Lower Congo.Conservation status (IUCN)Least Concern (LC)Threat to humansHarmlessUsesAquarium: commercialResilienceHigh, minimum population doubling time less than 15 months (tm More tetras & characinsMarbled headstanderAbramites hypselonotusStriped headstanderAnostomus anostomusOneline pencilfishNannostomus unifasciatusBarred pencilfishNannostomus espeiGolden pencilfishNannostomus beckfordiRedspotted tetraCopeina guttataSee all tetras & characins SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026