Fish ID: Threadfin Butterflyfish

Butterflyfish threadfin butterflyfish chaetodon auriga upi
Family Butterflyfish (CHAETODONTIDAE)
species Chaetodon auriga
size Up to 22cm
locality Coastal reefs and outer slopes
behaviour Solitary or in pairs
range Indian and Pacific Oceans

The body is white with two sets of parallel black lines perpendicular to each other. Unlike the Vagabonds, the rear is completely orange, with a small oval black spot on the tip of the dorsal, which also has a trailing filament.