HomeFreshwater aquarium fishOther freshwater fishLong-spined tripodfish Long-spined tripodfish (Pseudotriacanthus strigilifer) Scientific name: Pseudotriacanthus strigilifer Cantor, 1849 The Long-spined tripodfish (Pseudotriacanthus strigilifer) is a brackish-water fish of the family Triacanthidae. Native range: Indo-Pacific, Gulf of Oman to Indonesia and the Philippines. BiologySecond dorsal-fin spine more than 1/2 length of first dorsal-fin spine. Anal-fin base about 2 times in soft dorsal-fin base. Scales with an anterior to posterior series of high, thin, distally emarginated vertical ridges (Ref 9804).Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific namePseudotriacanthus strigiliferFamilyTriacanthidae (Triplespines)OrderTetraodontiformes (Puffers and Filefishes)ClassActinopterygii (Ray-finned fishes)Maximum length25.0Common length20.0Depth range2–110 m (7–361 ft)EnvironmentMarine; brackish; demersal; depth range 2 - 110 mClimateTropicalDistributionIndo-Pacific: Gulf of Oman to Indonesia and the Philippines.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: minor commercial; aquarium: commercialResilienceMedium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.) More other freshwater fishSouth American lungfishLepidosiren paradoxaLined soleAchirus lineatusPumpkinseedLepomis gibbosusShort-tailed pipefishMicrophis brachyurus brachyurusFinescale tigerfishDatnioides microlepisFreshwater garfishXenentodon cancilaSee 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