HomeFish encyclopediaRay-finned fishesNeedle fishesHalfbeaksSepik River halfbeak Sepik River halfbeak (Zenarchopterus kampeni) Scientific name: Zenarchopterus kampeni Weber, 1913 The Sepik River halfbeak (Zenarchopterus kampeni) is a freshwater fish of the family Hemiramphidae. In the aquarium it needs water at 24–28°C (75–82°F). Native range: Oceania and Asia, Ramu and Sepik rivers in Papua New Guinea and Mamberamo River in Irian Jaya, Indonesia. Sepik River halfbeak care at a glanceTemperature24–28°C (75–82°F) BiologyOccurs in lakes and backwaters to river channels, and lower sections of tributary streams. Caught using harpoons, hand nets, and scoop nets.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameZenarchopterus kampeniFamilyHemiramphidae (Halfbeaks)OrderBeloniformes (Needle fishes)ClassActinopterygii (Ray-finned fishes)Maximum length20.7Common length16EnvironmentFreshwater;; pH range: 6.0 - 8.0 pelagicClimateTropicalDistributionOceania and Asia: Ramu and Sepik rivers in Papua New Guinea and Mamberamo River in Irian Jaya, Indonesia.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: subsistence fisheriesResilienceHigh, 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