HomeFish encyclopediaRay-finned fishesNeedle fishesHalfbeaksShortfin halfbeak Shortfin halfbeak (Hyporhamphus improvisus) Scientific name: Hyporhamphus improvisus Smith, 1933 The Shortfin halfbeak (Hyporhamphus improvisus) is a marine fish of the family Hemiramphidae. Native range: Western Indian Ocean, endemic to southern Africa, from Quelimane to Delagoa Bay in Mozambique. BiologyDorsal spines (total): 0; Dorsal soft rays (total): 12-14; Anal spines: 0; Anal soft rays: 13 - 15Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameHyporhamphus improvisusFamilyHemiramphidae (Halfbeaks)OrderBeloniformes (Needle fishes)ClassActinopterygii (Ray-finned fishes)Maximum length18.0EnvironmentMarine; pelagic-neriticClimateTemperateDistributionWestern Indian Ocean: endemic to southern Africa, from Quelimane to Delagoa Bay in Mozambique.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