HomeFish encyclopediaRay-finned fishesNeedle fishesHalfbeaksAcute halfbeak Acute halfbeak (Hyporhamphus acutus pacificus) Scientific name: Hyporhamphus acutus pacificus Steindachner, 1900 The Acute halfbeak (Hyporhamphus acutus pacificus) is a marine fish of the family Hemiramphidae. Native range: Eastern Central Pacific, Hawaiian Islands. Species factsScientific nameHyporhamphus acutus pacificusFamilyHemiramphidae (Halfbeaks)OrderBeloniformes (Needle fishes)ClassActinopterygii (Ray-finned fishes)Maximum length15.4Depth range0–1 m (0–3 ft)EnvironmentMarine; pelagic-neritic; depth range 0 - 1 mClimateTropicalDistributionEastern Central Pacific: Hawaiian Islands.Conservation status (IUCN)Not EvaluatedThreat 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