HomeFreshwater aquarium fishRainbowfish & killifishGuinean killi Guinean killi (Archiaphyosemion guineense) Scientific name: Archiaphyosemion guineense Daget, 1954 The Guinean killi (Archiaphyosemion guineense) is a freshwater fish of the family Aplocheilidae. In the aquarium it needs water at 18–23°C (64–73°F). Native range: Africa, Guinea and Sierra Leone. Also known from the upper Niger and its affluents in Guinea. Liberia. Guinean killi care at a glanceTemperature18–23°C (64–73°F) BiologyOccurs in pools and small streams in the savanna. 7 cm SL. Not a seasonal killifish. Is difficult to maintain in aquarium.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameArchiaphyosemion guineenseFamilyAplocheilidae (Killifishes)OrderCyprinodontiformes (Live bearers, Killifishes and Rivulines)ClassActinopterygii (Ray-finned fishes)Maximum length7.0EnvironmentFreshwater;; pH range: 6.5 - 7.2; dH range: 12 - ? benthopelagic; non-migratoryClimateTropicalDistributionAfrica: Guinea and Sierra Leone. Also known from the upper Niger and its affluents in Guinea. Liberia.Conservation status (IUCN)Least Concern (LC)Threat to humansHarmlessUsesFisheries: of no interest; aquarium: 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