HomeFish encyclopediaRay-finned fishesPipefishes and SeahorsesPipefishes and seahorsesSouthwell's pipefish Southwell's pipefish (Siokunichthys southwelli) Scientific name: Siokunichthys southwelli Duncker, 1910 The Southwell's pipefish (Siokunichthys southwelli) is a marine fish of the family Syngnathidae. Native range: Western Indian Ocean, Sri Lanka. Western Central Pacific: Philippines. BiologyKnown only from plankton or night-light collections. 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 nameSiokunichthys southwelliFamilySyngnathidae (Pipefishes and seahorses)OrderSyngnathiformes (Pipefishes and Seahorses)ClassActinopterygii (Ray-finned fishes)Maximum length4.3EnvironmentMarine; demersalClimateTropicalDistributionWestern Indian Ocean: Sri Lanka. Western Central Pacific: Philippines.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