HomeFreshwater aquarium fishRainbowfish & killifishFalse jewel killi False jewel killi (Aphyosemion exigoideum) Scientific name: Aphyosemion exigoideum Radda & Huber, 1977 The False jewel killi (Aphyosemion exigoideum) is a freshwater fish of the family Nothobranchiidae. In the aquarium it needs water at 22–24°C (72–75°F). Native range: Africa, western Gabon. False jewel killi care at a glanceTemperature22–24°C (72–75°F) BiologyOccurs in brooks and swamps in the coastal rainforest. Not a seasonal killifish. Bottom spawner, 1 month incubation. Is easy to maintain in the aquarium.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameAphyosemion exigoideumFamilyNothobranchiidae (African rivulines)OrderCyprinodontiformes (Live bearers, Killifishes and Rivulines)ClassActinopterygii (Ray-finned fishes)Maximum length6.0EnvironmentFreshwater;; pH range: 7.0 - 7.5; dH range: 1 - 2 benthopelagic; non-migratoryClimateTropicalDistributionAfrica: western Gabon.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