HomeFish encyclopediaRay-finned fishesLive bearers, Killifishes and RivulinesAfrican rivulinesJewel killi Jewel killi (Aphyosemion exiguum) Scientific name: Aphyosemion exiguum Boulenger, 1911 The Jewel killi (Aphyosemion exiguum) is a freshwater fish of the family Nothobranchiidae. In the aquarium it needs water at 21–24°C (70–75°F). Native range: Africa, Cameroon, Equatorial Guinea, Gabon and Congo; possibly also in the Central African Republic. Jewel killi care at a glanceTemperature21–24°C (70–75°F) BiologyOccurs in swamps, swampy parts of brooks and small streams under forest cover on the inland plains rainforest. Not a seasonal killifish.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameAphyosemion exiguumFamilyNothobranchiidae (African rivulines)OrderCyprinodontiformes (Live bearers, Killifishes and Rivulines)ClassActinopterygii (Ray-finned fishes)Maximum length4.0EnvironmentFreshwater;; pH range: 6.0 - 7.0; dH range: 5 - 12 benthopelagic; non-migratoryClimateTropicalDistributionAfrica: Cameroon, Equatorial Guinea, Gabon and Congo; possibly also in the Central African Republic.Conservation status (IUCN)Least Concern (LC)Threat to humansHarmlessUsesFisheries: of no interest SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026