HomeFreshwater aquarium fishOther freshwater fishNilsson's pipefish Nilsson's pipefish (Syngnathus rostellatus) Scientific name: Syngnathus rostellatus Nilsson, 1855 The Nilsson's pipefish (Syngnathus rostellatus) is a brackish-water fish of the family Syngnathidae. Native range: Northeast Atlantic, Bergen, Norway and southern portions British Isles to Bay of Biscay. BiologyOften found on sandy shores among floating or attached seaweeds. Ovoviviparous. The male carries the eggs in a brood pouch which is found under the tail. Spawns in summer. Young are sometimes caught pelagically in the North Sea.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameSyngnathus rostellatusFamilySyngnathidae (Pipefishes and seahorses)OrderSyngnathiformes (Pipefishes and Seahorses)ClassActinopterygii (Ray-finned fishes)Maximum length17.0Depth range0–15 m (0–49 ft)EnvironmentMarine; brackish; demersal; non-migratory; depth range 0 - 15 mClimateTemperateDistributionNortheast Atlantic: Bergen, Norway and southern portions British Isles to Bay of Biscay.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: of no interest; aquarium: public aquariumsResilienceHigh, minimum population doubling time less than 15 months (K=0.75) More other freshwater fishFinescale tigerfishDatnioides microlepisFreshwater garfishXenentodon cancilaShort-tailed pipefishMicrophis brachyurus brachyurusPumpkinseedLepomis gibbosusLined soleAchirus lineatusSouth American lungfishLepidosiren paradoxaSee all other freshwater fish SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026