Triangular butterflyfish
  • Chaetodon triangulum
  • EnglishName: Triangular butterflyfish
  • Local Name : Thineskan bibee
  • Size : Max. 15 cm
  • Family: CHAETODONTIDAE
  • Order : Perciformes
  • Distinctive Characters: Dorsal fin with 11 spines and 23-26 rays. Anal fin with 3 spines and 20-21 rays. Pectoral fin with 14 rays. Body depth 1.1 in standard length. Dorsal and anal fins elevated posteriorly. Snout small and pointed.
  • Colour: Ground colour light brown. Dark chevron markings over most of body. Snout-eye band and opercular bar reddish. Caudal fin with broad black triangular or diamond shaped patch bordered with yellow.
  • Habitat and Biology: Usually found in shallow waters at depths of 2 to 12 m in the close association with branching corals. Feeds on coral polyps.
  • Distribution: Maldives to Western Indonesia.
  • Remarks: Chaetodon triangulum is sometimes classified in the genus Gonochaetodon. Differs from C. baronessa Cuvier from the Western Pacific only in caudal colouration. Being a coralivore this species is not easy to maintain in an aquarium.