Scientific Name
Chaetodon plebeius  
Chaetodon plebeius藍斑蝴蝶魚
by: Lab of Fish Ecol. and Evo., BRCAS
Author Cuvier, 1831 Depth 3 - 10M
Chinese 藍斑蝴蝶魚 Poisonous Fish No 
Family_Chinese 蝴蝶魚科 Economic Fish No 
Family F393 Chaetodontidae Edible Fish No  Chinese In Mainland China 四棘蝴蝶魚 
Max Length 15 cm  Aquarium Fish Yes  Common Name 藍腰蝶、雲蝶、蝶仔(臺東)、紅司公(澎湖)、虱鬢(澎湖) 
Distribution in World India Ocean to West Pacific Ocean   Distribution in Taiwan South、North、North East、PonFu、ShaoLiuChew、LanI Is.、Greeb IS.、Tung Sa IS. 
Habitats Coral、Coastal、Lagoon  Holotype Locality South Seas 
Synonyms Chaetodon cordiformis, Chaetodon plebelus, Megaprotodon maculiceps, Megaprotodon plebeius   
Reference 臺灣魚類誌(沈等, 1993)  Cuvier, G. etc. 1831 Watanabe, M. etc. 1946 沈世傑 編 Shih-Chieh Shen ed. 1993 
Specimen List ASIZP0073521. ASIZP0806070. ASIZP0916070. ASIZP0916798. FRIP22280. NMMBP04533. NMMSTP00034. NTMP0139. NTUM00618. NTUM00619. NTUM00735.  
Common Name Two-spot coralfish; Coral butterflyfish; Blueblotch butterflyfish; Bluespot butterflyfish; Blue-spot butterflyfish 
Redlist Status NL 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 XIII to XIV spines, no notch between spinous and soft dorsal fin; and 16 to 18 soft rays; anal fin with III spines and 14 to 16 soft rays; pectoral fins transparent with 15 soft rays; pelvic fins with I stout spine and 5 branched rays; caudal fin rounded. Body is yellow with narrow dark stripes on the sides; an elongate blue blotch on the upper sides and a white-edged black spot on the caudal peduncle; a blue-edged black bar runs vertically on the head across the eye.
habitats Feed mainly on polyps of Acropora corals in lagoons and outer reefs at depths of 3 to 20 m. Usually in pairs. Oviparous. 
Distribution Distributed from the Andaman Sea eastward throughout the Indo-Malayan Archipelago to Fiji, northward to southern Japan, southward to Lord Howe Island. Widely around coral reefs in Taiwan. 
Utility Marine aquarium fish.