HomeFish encyclopediaRay-finned fishesSilversidesRainbowfishes, blue eyesPima River rainbowfish Pima River rainbowfish (Melanotaenia pimaensis) Scientific name: Melanotaenia pimaensis Allen, 1981 The Pima River rainbowfish (Melanotaenia pimaensis) is a freshwater fish of the family Melanotaeniidae. Native range: Oceania, known only from the Pima River at the junction with the Tua River in the Southern Highlands, Papua New Guinea. BiologyDorsal spines (total): 5 - 7; Dorsal soft rays (total): 12-17; Anal spines: 1; Anal soft rays: 20 - 24Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameMelanotaenia pimaensisFamilyMelanotaeniidae (Rainbowfishes, blue eyes)OrderAtheriniformes (Silversides)ClassActinopterygii (Ray-finned fishes)Maximum length10.0Common length6.0EnvironmentFreshwater; benthopelagicClimateTropicalDistributionOceania: known only from the Pima River at the junction with the Tua River in the Southern Highlands, Papua New Guinea.Conservation status (IUCN)Data deficient (DD)Threat to humansHarmlessUsesFisheries: of no interest; aquarium: commercialResilienceMedium, 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