Acanthurus nigrofuscus, M
Widespread Indo-West Pacific. Usually occurs in algae rocky habitats. Coastal reefs and harbours to outer reef gutters and channels to about 20m depth. Adults usually in small groups, but form large schools in some oceanic locations. Juveniles are often seen feeding with mixed species aggregations. Adults identified by the small orange spots on their head, blue to mauve tail and a dark spot at the end of the anal and dorsal fin-base. Juveniles brown to bluish black when small, and the head with orange scribbles that break up into spots with growth. Length to 20cm.