HomeFish encyclopediaRay-finned fishesPipefishes and SeahorsesPipefishes and seahorsesSpined pipefish Spined pipefish (Phoxocampus diacanthus) Scientific name: Phoxocampus diacanthus Schultz, 1943 The Spined pipefish (Phoxocampus diacanthus) is a marine fish of the family Syngnathidae. Native range: Indo-Pacific, Sri Lanka to Samoa, north to Hong Kong, south to New Caledonia. BiologyDorsal spines (total): 0; Dorsal soft rays (total): 20-24. Rings: 15-16+25-28.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific namePhoxocampus diacanthusFamilySyngnathidae (Pipefishes and seahorses)OrderSyngnathiformes (Pipefishes and Seahorses)ClassActinopterygii (Ray-finned fishes)Maximum length8.7Depth range40 m (131 ft)EnvironmentMarine; reef-associated; depth range ? - 40 mClimateTropicalDistributionIndo-Pacific: Sri Lanka to Samoa, north to Hong Kong, south to New Caledonia.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