Fish ID: Pennant Bannerfish

Butterflyfish pennant bannerfish heniochus chrysostomus gbr
Family Butterflyfish (CHAETODONTIDAE)
species Heniochus chrysostomus
size To 18cm
locality Inshore and outer reefs
behaviour Solitary or in pairs
range East Indo Pacific & GBR

White body with two black bars down the whole body, either side of the white bar directly below the long dorsal filament; dorsal and tail fins are yellow, and black bar across the nape between the eyes.