HomeFish encyclopediaRay-finned fishesPipefishes and SeahorsesPipefishes and seahorsesRagged-tail pipefish Ragged-tail pipefish (Microphis retzii) Scientific name: Microphis retzii Bleeker, 1856 The Ragged-tail pipefish (Microphis retzii) is a freshwater fish of the family Syngnathidae. Native range: Asia and Oceania, Indonesia and the Philippines southeastward to Ponape [=Pohnpei] and Samoa. BiologyMajority of collections are from freshwater streams and rivers. Probably reaches 14.5 cm SL. 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 nameMicrophis retziiFamilySyngnathidae (Pipefishes and seahorses)OrderSyngnathiformes (Pipefishes and Seahorses)ClassActinopterygii (Ray-finned fishes)Maximum length14.5EnvironmentFreshwater; demersalClimateTropicalDistributionAsia and Oceania: Indonesia and the Philippines southeastward to Ponape [=Pohnpei] and Samoa.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