Heniochus acuminatus (Linnaeus, 1758)
Pennant coralfish
Heniochus acuminatus
photo by Randall, J.E.

Family:  Chaetodontidae (Butterflyfishes)
Max. size:  25 cm TL (male/unsexed)
Environment:  reef-associated; brackish; marine; depth range 2 - 178 m
Distribution:  Indo-Pacific: East Africa and Persian Gulf to the Society Islands, north to southern Japan, south to Lord Howe Island. Throughout Micronesia.
Diagnosis:  Dorsal spines (total): 11-12; Dorsal soft rays (total): 22-27; Anal spines: 3-3; Anal soft rays: 17-19. Description: Snout length 2.7-3.3 in HL; body depth 1.2-1.5 in SL (Ref. 90102).
Biology:  Inhabit deep, protected lagoons and channels, and the deeper parts of outer reef slopes. Juveniles are often solitary while adults occur in pairs (Ref. 1602, 48636). A planktivorous species that generally remains within a few meters of the reef. Juveniles may sometimes pick on parasites on the epidermis of other fish (Ref. 5503). Oviparous (Ref. 205). Form pairs during breeding (Ref. 205).
IUCN Red List Status: Least Concern (LC); Date assessed: 05 October 2009 Ref. (130435)
Threat to humans:  harmless
Country info:  Two specimens captured by hook and line off the coasts of Al–Fao City Peninsula, southern Iraq. Arabian Gulf confirm the presence of the species in Iraqi waters. Lack of previous records may be due to lack of sampling or its current presence may be due to ballast waters released by oil tankers and commercial vessels (Ref. 97265).. Also Ref. 4859.


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