Balistapus undulatus (Park, 1797)
Orange-lined triggerfish
Balistapus undulatus
photo by Randall, J.E.

Family:  Balistidae (Triggerfishes)
Max. size:  30 cm TL (male/unsexed)
Environment:  reef-associated; marine; depth range 2 - 50 m
Distribution:  Indo-Pacific: Red Sea south to Natal, South Africa (Ref. 4420) and east to the Line, Marquesan and Tuamoto islands, north to southern Japan, south to the southern Great Barrier Reef and New Caledonia.
Diagnosis:  Dorsal spines (total): 3-3; Dorsal soft rays (total): 24-27; Anal spines: 0-0; Anal soft rays: 20-24. This species is distinguished by the following characters: front of eye without the elongate groove; enlarged scales above the pectoral-fin base and just behind the gill opening to form a flexible tympanum; the scales of the caudal peduncle with 2 longitudinal rows of large anterior-projecting spines; the slightly rounded caudal fin with compressed peduncle; head and body colour green to brown with diagonally curved orange lines and a large round black blotch covering most of the caudal-fin base; rays of soft dorsal, anal and pectoral fins orange and also the caudal fin (Ref. 10920, 9770).
Biology:  Adults which are territorial in nature occur in coral-rich areas of deep lagoon and seaward reefs from the lower surge zone to at least 50 meters (Ref. 48637). They feed on a variety of benthic organisms such as algae, echinoderms, fishes, mollusks, tunicates, sponges, and hydrozoans. Eggs are laid as one cluster in a shallow excavation on sand or rubble along channels. (Ref. 1602). Marketed fresh and dried-salted (Ref. 9770).
IUCN Red List Status: Not Evaluated (N.E.) Ref. (123251)
Threat to humans:  traumatogenic
Country info:   

Entered by: Capuli, Estelita Emily - 15.07.92
Modified by: Luna, Susan M. - 28.03.19
Checked by: Matsuura, Keiichi - 02.10.95

Source and more info: For personal, classroom, and other internal use only. Not for publication.

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