HomeFish encyclopediaRay-finned fishesNeedle fishesHalfbeaksAllen's river garfish Allen's river garfish (Zenarchopterus alleni) Scientific name: Zenarchopterus alleni Collette, 1982 The Allen's river garfish (Zenarchopterus alleni) is a freshwater fish of the family Hemiramphidae. Native range: Asia, known on the basis of a single male specimen collected from Mamberamo River at Batavia Bivak in Irian Jaya, Indonesia. BiologyDorsal soft rays (total): 14; Anal soft rays: 13Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameZenarchopterus alleniFamilyHemiramphidae (Halfbeaks)OrderBeloniformes (Needle fishes)ClassActinopterygii (Ray-finned fishes)Maximum length13.0EnvironmentFreshwater; pelagicClimateTropicalDistributionAsia: known on the basis of a single male specimen collected from Mamberamo River at Batavia Bivak in Irian Jaya, Indonesia.Conservation status (IUCN)Data deficient (DD)Threat to humansHarmlessResilienceHigh, minimum population doubling time less than 15 months (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