HomeFreshwater aquarium fishRainbowfish & killifishPowder-blue panchax Powder-blue panchax (Pachypanchax omalonotus) Scientific name: Pachypanchax omalonotus Dum?ril, 1861 The Powder-blue panchax (Pachypanchax omalonotus) is a freshwater fish of the family Aplocheilidae. In the aquarium it needs water at 22–28°C (72–82°F). Native range: Africa, western and northern Madagascar and adjacent islands. Powder-blue panchax care at a glanceTemperature22–28°C (72–82°F) BiologyOccurs in brooks and small rivers, mostly in quiet parts. Not a seasonal killifish. Is difficult to maintain in aquarium; prefers aquaria with rocks, plants and driftwood.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific namePachypanchax omalonotusFamilyAplocheilidae (Killifishes)OrderCyprinodontiformes (Live bearers, Killifishes and Rivulines)ClassActinopterygii (Ray-finned fishes)Maximum length9.5EnvironmentFreshwater; benthopelagic; non-migratoryClimateTropicalDistributionAfrica: western and northern Madagascar and adjacent islands.Conservation status (IUCN)Least Concern (LC)Threat to humansHarmlessUsesAquarium: commercial More rainbowfish & killifishRed-Tailed SilversideBedotia geayiTwostripe lyretailAphyosemion bivittatumLyretail 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