Naso lituratus, M
Widespread West and central Pacific. Replaced by Naso elegans in the Indian Ocean and Red Sea. Coastal and inner reef flats and slopes. Adults usually in small groups or schools. Juveniles on shallow rocky reefs, sometimes in small aggregations mixed with other small acanthurids. Adults are identified by their orange double peduncular spines. Distinguished from Naso elegans by the broad black band along dorsal fin base and orange anal and ventral fins versus yellow dorsal and dusky ventral and anal fins. Both species can be found together in Bali. Length to 45cm, excluding the caudal filaments.