HomeFish encyclopediaRay-finned fishesLive bearers, Killifishes and RivulinesAfrican rivulinesArnold's killi Arnold's killi (Fundulopanchax arnoldi) Scientific name: Fundulopanchax arnoldi Boulenger, 1908 The Arnold's killi (Fundulopanchax arnoldi) is a freshwater fish of the family Nothobranchiidae. In the aquarium it needs water at 22–25°C (72–77°F). Native range: Africa, southern Nigeria. Arnold's killi care at a glanceTemperature22–25°C (72–77°F) BiologyOccurs in temporary swamps and swampy parts of smaller brooks in the coastal rainforest. Bottom spawner, 2 months incubation.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameFundulopanchax arnoldiFamilyNothobranchiidae (African rivulines)OrderCyprinodontiformes (Live bearers, Killifishes and Rivulines)ClassActinopterygii (Ray-finned fishes)Maximum length5.5EnvironmentFreshwater;; pH range: 5.8 - 7.2 benthopelagic; non-migratoryClimateTropicalDistributionAfrica: southern Nigeria.Conservation status (IUCN)Endangered (EN) (B1ab(ii,iii,v)+2ab(ii,iii,v))Threat to humansHarmless SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026