HomeFish encyclopediaRay-finned fishesNeedle fishesNeedlefishesLong tom Long tom (Strongylura krefftii) Scientific name: Strongylura krefftii G?nther, 1866 The Long tom (Strongylura krefftii) is a freshwater fish of the family Belonidae. Native range: Asia and Oceania, New Guinea and Australia. BiologyDorsal soft rays (total): 16-18; Anal soft rays: 19 - 20Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameStrongylura krefftiiFamilyBelonidae (Needlefishes)OrderBeloniformes (Needle fishes)ClassActinopterygii (Ray-finned fishes)Maximum length85.0EnvironmentFreshwater; brackish; pelagic; depth range 0 - ? mClimateTropicalDistributionAsia and Oceania: New Guinea and Australia.Conservation status (IUCN)Not EvaluatedThreat to humansTraumatogenicUsesAquarium: public aquariumsResilienceMedium, 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