HomeFish encyclopediaRay-finned fishesPipefishes and SeahorsesPipefishes and seahorsesStraightstick pipefish Straightstick pipefish (Trachyrhamphus longirostris) Scientific name: Trachyrhamphus longirostris Kaup, 1856 The Straightstick pipefish (Trachyrhamphus longirostris) is a marine fish of the family Syngnathidae. Native range: Indo-West Pacific, Red Sea and western Indian Ocean eastward to Japan and eastern Australia. BiologyDistinguished by the lack of appendages on the trunk in the juveniles, head at no angle to the body, and color patterns.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameTrachyrhamphus longirostrisFamilySyngnathidae (Pipefishes and seahorses)OrderSyngnathiformes (Pipefishes and Seahorses)ClassActinopterygii (Ray-finned fishes)Maximum length40.0Depth range16–91 m (52–299 ft)EnvironmentMarine; demersal; depth range 16 - 91 mClimateTropicalDistributionIndo-West Pacific: Red Sea and western Indian Ocean eastward to Japan and eastern Australia.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceMedium, 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