HomeFish encyclopediaRay-finned fishesSilversidesRainbowfishes, blue eyesYapen rainbowfish Yapen rainbowfish (Melanotaenia japenensis) Scientific name: Melanotaenia japenensis Allen & Cross, 1980 The Yapen rainbowfish (Melanotaenia japenensis) is a freshwater fish of the family Melanotaeniidae. Native range: Asia, known only from Yapen Island in Irian Jaya, Indonesia. BiologyDorsal spines: 5 - 6; Dorsal soft rays: 15-17; Anal spines: 1; Anal soft rays: 26 - 28Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameMelanotaenia japenensisFamilyMelanotaeniidae (Rainbowfishes, blue eyes)OrderAtheriniformes (Silversides)ClassActinopterygii (Ray-finned fishes)Maximum length7.7EnvironmentFreshwater; benthopelagicClimateTropicalDistributionAsia: known only from Yapen Island in Irian Jaya, Indonesia.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceMedium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026