HomeFish encyclopediaRay-finned fishesPuffers and FilefishesFilefishesJapanese inflator filefish Japanese inflator filefish (Brachaluteres ulvarum) Scientific name: Brachaluteres ulvarum Jordan & Fowler, 1902 The Japanese inflator filefish (Brachaluteres ulvarum) is a marine fish of the family Monacanthidae. Native range: Northwest Pacific, Japan. BiologyInhabits bottoms with green seaweed. Secretive on deep coastal slopes, usually among soft corals. Feeds on algae and crabs. Capable of inflating its body like puffers.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameBrachaluteres ulvarumFamilyMonacanthidae (Filefishes)OrderTetraodontiformes (Puffers and Filefishes)ClassActinopterygii (Ray-finned fishes)Maximum length7.5Depth range25–30 m (82–98 ft)EnvironmentMarine; reef-associated; depth range 25 - 30 mClimateTemperateDistributionNorthwest Pacific: Japan.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