HomeFreshwater aquarium fishRainbowfish & killifishElegant killi Elegant killi (Aphyosemion elegans) Scientific name: Aphyosemion elegans Boulenger, 1899 The Elegant killi (Aphyosemion elegans) is a freshwater fish of the family Nothobranchiidae. In the aquarium it needs water at 20–24°C (68–75°F). Native range: Africa, middle Congo River drainage including the lower Ubangi River (Republic of Congo and Democratic Republic of the Congo). Elegant killi care at a glanceTemperature20–24°C (68–75°F) BiologyOccurs in brooks, swamps parts of small streams, swamps, pools and border regions of lakes 5 cm TL. Not a seasonal killifish. Is difficult to maintain in aquarium.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameAphyosemion elegansFamilyNothobranchiidae (African rivulines)OrderCyprinodontiformes (Live bearers, Killifishes and Rivulines)ClassActinopterygii (Ray-finned fishes)Maximum length5.0Common length4.0EnvironmentFreshwater;; pH range: 6.5 - 7.2 benthopelagic; non-migratoryClimateTropicalDistributionAfrica: middle Congo River drainage including the lower Ubangi River (Republic of Congo and Democratic Republic of the Congo).Conservation status (IUCN)Least Concern (LC)Threat to humansHarmlessUsesAquarium: commercial More rainbowfish & killifishTwostripe lyretailAphyosemion bivittatumRed-Tailed SilversideBedotia geayiLyretail panchaxAphyosemion australeCelebes rainbowfishMarosatherina ladigesiCelebes rainbowTelmatherina celebensisMarmorated medakaOryzias marmoratusSee all rainbowfish & killifish SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026