HomeFish encyclopediaRay-finned fishesPuffers and FilefishesBoxfishesTriangular boxfish Triangular boxfish (Tetrosomus concatenatus) Scientific name: Tetrosomus concatenatus Bloch, 1785 The Triangular boxfish (Tetrosomus concatenatus) is a marine fish of the family Ostraciidae. Native range: Indo-West Pacific, East Africa to southern Japan and New Caledonia. BiologyDorsal spines (total): 0; Dorsal soft rays (total): 9; Anal spines: 0; Anal soft rays: 9 - 10. Males with blue line and spots that fade rapidly.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameTetrosomus concatenatusFamilyOstraciidae (Boxfishes)OrderTetraodontiformes (Puffers and Filefishes)ClassActinopterygii (Ray-finned fishes)Maximum length30.0Depth range60 m (197 ft)EnvironmentMarine; reef-associated; depth range ? - 60 mClimateTemperateDistributionIndo-West Pacific: East Africa to southern Japan and New Caledonia.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceHigh, minimum population doubling time less than 15 months (Fec assumed to be > 10,000) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026