HomeFish encyclopediaRay-finned fishesPipefishes and SeahorsesPipefishes and seahorsesDouble-ended pipefish Double-ended pipefish (Trachyrhamphus bicoarctatus) Scientific name: Trachyrhamphus bicoarctatus Bleeker, 1857 The Double-ended pipefish (Trachyrhamphus bicoarctatus) is a marine fish of the family Syngnathidae. Native range: Indo-West Pacific, Red Sea and East Africa to New Caledonia, north to southern Japan; Mariana Islands in Micronesia. BiologyDorsal spines (total): 0; Dorsal soft rays (total): 24-32; Anal spines: 0; Anal soft rays: 4. Brownish in color, usually with small spots on trunk.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameTrachyrhamphus bicoarctatusFamilySyngnathidae (Pipefishes and seahorses)OrderSyngnathiformes (Pipefishes and Seahorses)ClassActinopterygii (Ray-finned fishes)Maximum length40.0Depth range1–42 m (3–138 ft)EnvironmentMarine; reef-associated; depth range 1 - 42 mClimateTropicalDistributionIndo-West Pacific: Red Sea and East Africa to New Caledonia, north to southern Japan; Mariana Islands in Micronesia.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