HomeMarine aquarium fishTriggers, puffers & boxfishStrap-weed file-fish Strap-weed file-fish (Pseudomonacanthus macrurus) Scientific name: Pseudomonacanthus macrurus Bleeker, 1857 The Strap-weed file-fish (Pseudomonacanthus macrurus) is a marine fish of the family Monacanthidae. Native range: Indo-West Pacific, Indian Ocean, South China Sea, southern Japan. Reported from Papua New Guinea. BiologyInhabits shallow coastal algal reefs and estuaries. Adults are often in pairs.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific namePseudomonacanthus macrurusFamilyMonacanthidae (Filefishes)OrderTetraodontiformes (Puffers and Filefishes)ClassActinopterygii (Ray-finned fishes)Maximum length18.0Common length13.5Depth range3–7 m (10–23 ft)EnvironmentMarine; reef-associated; depth range 3 - 7 mClimateTropicalDistributionIndo-West Pacific: Indian Ocean, South China Sea, southern Japan. Reported from Papua New Guinea.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesAquarium: commercialResilienceMedium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.) More triggers, puffers & boxfishWhite-banded triggerfishRhinecanthus aculeatusOrange filefishAluterus schoepfiiOrangespotted filefishCantherhines pullusBuffalo trunkfishLactophrys trigonusSpot-fin porcupinefishDiodon hystrixBlue-spotted pufferArothron caeruleopunctatusSee all triggers, puffers & boxfish SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026