Scientific Name	Chaetodon baronessa   Pronounce			by: Lab of Fish Ecol. and Evo., BRCAS
Author	Cuvier, 1829	Depth	5 - 15M
Chinese	曲紋蝴蝶魚	Poisonous Fish	No
Family_Chinese	蝴蝶魚科	Economic Fish	No
Family	F393　Chaetodontidae	Edible Fish	No	Chinese In Mainland China	曲紋蝴蝶魚
Max Length	15 cm	Aquarium Fish	Yes	Common Name	天王蝶、天皇蝶、三角紋蝶、紅司公(澎湖)
Distribution in World	India Ocean to West Pacific Ocean	Distribution in Taiwan	East、South、PonFu、LanI Is.、Greeb IS.、Tung Sa IS.、Nan Sa IS.
Habitats	Coral、Coastal、Lagoon	Holotype Locality	no locality
Synonyms	Chaetodon barronessa
Reference	臺灣魚類誌(沈等, 1993)  沈世傑 編 Shih-Chieh Shen ed. 1993
Specimen List	ASIZP0063384. NMMBP05245. NMMSTP00059. NMNSF00657. NTMP0116. NTUM00659. NTUM00660. NTUM00661. NTUM00745. NTUM01428. NTUM08058.
Common Name	Triangular butterflyfish; Eastern triangular butterflyfish; Eastern triangle butterflyfish
Redlist Status	Not in IUCN Redlist
Characteristic	Body oval, deep, strongly compressed. Head length about equal to head height; preopercle smooth, without prominent spines. Snout short. Small protractile mouth with brush-like teeth in the jaws. Dorsal fin with XI or XII spines, no notch between spinous and soft dorsal fin; and 23 to 26 soft rays; anal fin with III spines and 20 to 22 soft rays; pectoral fins transparent with 13 to 14 soft rays; pelvic fins with I stout spine and 5 branched rays; caudal fin rounded. a pattern of alternating cream and grey-brown to purplish chevron-shaped narrow bars on sides; a dark purplish bar with pale edges across caudal fin; three dark bars on the head, including one running across the eye.
habitats	Occur in lagoon and seaward reefs at depths of 3 to 15 m. Feed exclusively on the polyps of the tubular Acropora corals. Swim in pairs and are territorial.
Distribution	Distributed from Cocos-Keeling in the eastern Indian Ocean through Indonesia, New Guinea, and Philippines north to southern Japan, east to Fiji. It is found in eastern and southern Taiwanese waters, and Penghu Is..
Utility	Marine aquarium fish.