HomeMarine aquarium fishTriggers, puffers & boxfishOrange-lined triggerfish Orange-lined triggerfish (Balistapus undulatus) Scientific name: Balistapus undulatus Park, 1797 The Orange-lined triggerfish (Balistapus undulatus) is a marine fish of the family Balistidae. BiologyDorsal spines (total): 3; Dorsal soft rays (total): 24-27; Anal spines: 0; Anal soft rays: 20 - 24. Scales enlarged above the pectoral-fin base and just behind the gill opening to form a flexible tympanum; scales of caudal peduncle with 2 longitudinal rows of large anterior-projecting spines. No groove in front of eye. Caudal peduncle compressed. Color: dark green to dark brown with oblique curved orange lines on posterior head and body; an oblique band of narrow blue and orange stripes from around the mouth to below the pectoral fin; a large round black blotch around peduncular spines; rays of soft dorsal, anal and pectoral fins orange; caudal fin orange.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameBalistapus undulatusFamilyBalistidae (Triggerfishes)OrderTetraodontiformes (Puffers and Filefishes)ClassActinopterygii (Ray-finned fishes)Maximum length30.0Common length26.0Depth range2–50 m (7–164 ft)EnvironmentMarine; reef-associated; depth range 2 - 50 mClimateTropicalDistributionIndo-Pacific: Red Sea south to Natal, South Africa and east to the Line, Marquesan and Tuamoto islands, north to southern Japan, south to the southern Great Barrier Reef and New Caledonia.Conservation status (IUCN)Not EvaluatedThreat to humansTraumatogenicUsesFisheries: commercial; aquarium: commercialResilienceMedium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.) More triggers, puffers & boxfishWhite-banded triggerfishRhinecanthus aculeatusYellowmargin triggerfishPseudobalistes flavimarginatusBlackbelly triggerfishRhinecanthus verrucosusBoomerang triggerfishSufflamen bursaGilded triggerfishXanthichthys auromarginatusSouthern Atlantic sharpnose-pufferCanthigaster figueiredoiSee 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