HomeFish encyclopediaRay-finned fishesPipefishes and SeahorsesPipefishes and seahorsesSlender pipefish Slender pipefish (Microphis caudocarinatus) Scientific name: Microphis caudocarinatus Weber, 1907 The Slender pipefish (Microphis caudocarinatus) is a freshwater fish of the family Syngnathidae. Native range: Asia, known only from a juvenile specimen collected in the Tawarin River, northern Irian Jaya, Indonesia in 1903. BiologyDorsal spines (total): 0; Dorsal soft rays (total): 42Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameMicrophis caudocarinatusFamilySyngnathidae (Pipefishes and seahorses)OrderSyngnathiformes (Pipefishes and Seahorses)ClassActinopterygii (Ray-finned fishes)Maximum length6.8EnvironmentFreshwater; demersalClimateTropicalDistributionAsia: known only from a juvenile specimen collected in the Tawarin River, northern Irian Jaya, Indonesia in 1903.Conservation status (IUCN)Data deficient (DD)Threat 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