HomeFish encyclopediaRay-finned fishesPipefishes and SeahorsesPipefishes and seahorsesBony-headed pipefish Bony-headed pipefish (Nannocampus subosseus) Scientific name: Nannocampus subosseus G?nther, 1870 The Bony-headed pipefish (Nannocampus subosseus) is a marine fish of the family Syngnathidae. Native range: Eastern Indian Ocean, known only from Western Australia. BiologyOne specimen taken from a rock pool. Ovoviviparous. The male carries the eggs in a brood pouch which is found under the tail. Males may be brooding at 8.7 cm SL.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameNannocampus subosseusFamilySyngnathidae (Pipefishes and seahorses)OrderSyngnathiformes (Pipefishes and Seahorses)ClassActinopterygii (Ray-finned fishes)Maximum length9.1Depth range3–8 m (10–26 ft)EnvironmentMarine; demersal; depth range 3 - 8 mClimateSubtropicalDistributionEastern Indian Ocean: known only from Western Australia.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