Heniochus monoceros Cuvier, 1831
Masked bannerfish
photo by Allen, G.R.

Family:  Chaetodontidae (Butterflyfishes)
Max. size:  24 cm TL (male/unsexed)
Environment:  reef-associated; depth range 2 - 30 m
Distribution:  Indo-Pacific: East Africa to the Tuamoto Islands, north to southern Japan, south to New South Wales and Tonga.
Diagnosis:  Dorsal spines (total): 12-12; Dorsal soft rays (total): 24-27; Anal spines: 3-3; Anal soft rays: 17-19. Description: A pair of bony knobs is on the forehead (Ref.1602). Adults with short banner (Ref. 48636). Snout length 3.0-3.6 in HL; body depth 1.5-1.6 in SL (Ref. 90102).
Biology:  Occur in lagoon and seaward reefs with rich coral growth. Juveniles solitary; adults are often paired and occasionally found hovering side by side under tabular corals (Ref. 1602). Feed on bottom living animals (Ref. 6113), e.g. invertebrates associated with algal zones (Ref. 5503). Oviparous (Ref. 205). Form pairs during breeding (Ref. 205). Minimum depth reported taken from Ref. 30874.
IUCN Red List Status: Least Concern (LC); Date assessed: 09 October 2009 Ref. (123251)
Threat to humans:  harmless
Country info:   

Entered by: Capuli, Estelita Emily - 05.06.92
Modified by: Luna, Susan M. - 15.03.06
Checked by: Palomares, Maria Lourdes D. - 30.03.94

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