HomeFish encyclopediaRay-finned fishesPipefishes and SeahorsesPipefishes and seahorsesSeaweed pipefish Seaweed pipefish (Syngnathus schlegeli) Scientific name: Syngnathus schlegeli Kaup, 1856 The Seaweed pipefish (Syngnathus schlegeli) is a brackish-water fish of the family Syngnathidae. Native range: Northwest Pacific, around Vladivostok, Russia Federation southward to the Gulf of Tonkin. BiologyCommon in estuaries and in association with Zostera and other vegetation. Juveniles associate with drifting seaweed. Ovoviviparous. The male carries the eggs in a brood pouch which is found under the tail. Used in Chinese medicine.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameSyngnathus schlegeliFamilySyngnathidae (Pipefishes and seahorses)OrderSyngnathiformes (Pipefishes and Seahorses)ClassActinopterygii (Ray-finned fishes)Maximum length30.0Common length20.0EnvironmentMarine; brackish; demersal; oceanodromousClimateTropicalDistributionNorthwest Pacific: around Vladivostok, Russia Federation southward to the Gulf of Tonkin.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