Heniochus chrysostomus Cuvier, 1831
Threeband pennantfish
Heniochus chrysostomus
photo by Randall, J.E.

 Family:  Chaetodontidae (Butterflyfishes)
 Max. size:  18 cm TL (male/unsexed)
 Environment:  reef-associated; depth range 2 - 40 m
 Distribution:  Indo-Pacific: Western India to Pitcairn Islands, north to southern Japan, south to Rowley Shoals, southern Queensland, and New Caledonia; throughout Micronesia.
 Diagnosis:  Dorsal spines (total): 12-13; Dorsal soft rays (total): 21-22; Anal spines: 0-0; Anal soft rays: 17-18. Description: Body color is white with three oblique broad dark brown bands, the first running from the top of the head through the eye to the abdomen, the second from the fourth dorsal spine to the posterior of the anal fin, and the third on the back and the adjacent dorsal fin (Ref. 4855). Juveniles have a longer, narrower "pennant" than adults as well as a double ocellus in the black portion of the anal fin (Ref. 37816). Snout length 3.0-3.6 in HL; body depth 1.5-1.6 in SL (Ref. 90102).
 Biology:  Common in coral-rich areas of subtidal reef flats and lagoon and seaward reefs. Juveniles solitary and usually found in estuaries and lagoons; adults usually in pairs (Ref. 48636). Feed mainly on coral polyps. Oviparous (Ref. 205). Form pairs during breeding (Ref. 205). Minimum depth reported taken from Ref. 30874.
 IUCN Red List Status:   (Ref. 96402)
 Threat to humans:  harmless
 Country info:   

 Entered by: Capuli, Estelita Emily - 05.06.92
 Modified by: Luna, Susan M. - 15.03.06
 Checked by: Agustin, Liza Q. - 12.08.94

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