HomeFish encyclopediaRay-finned fishesPipefishes and SeahorsesPipefishes and seahorsesBarbed pipefish Barbed pipefish (Urocampus nanus) Scientific name: Urocampus nanus G?nther, 1870 The Barbed pipefish (Urocampus nanus) is a brackish-water fish of the family Syngnathidae. Native range: Northwest Pacific, restricted to southern Japan and adjacent coasts. BiologyCommon in protected inshore or estuarine habitats and among Zostera sp.. Ovoviviparous. The male carries the eggs in a brood pouch which is found under the tail.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameUrocampus nanusFamilySyngnathidae (Pipefishes and seahorses)OrderSyngnathiformes (Pipefishes and Seahorses)ClassActinopterygii (Ray-finned fishes)Maximum length13.4EnvironmentMarine; brackish; demersal; oceanodromousClimateSubtropicalDistributionNorthwest Pacific: restricted to southern Japan and adjacent coasts.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