Inhabits the upper edge of outer reef slopes and inshore rocky reefs (Ref. 7247, 54301). Often hovers in small or large schools over the reefs (Ref. 6110). Juveniles associate with drifting seaweed (Ref. 12114, 12115). Often in aggregations (Ref. 9710). Feeds on zooplankton, benthic algae, and small invertebrates (Ref. 1602).