Jan. 8 2014
It's most likely the Longfin Bannerfish (Heniochus acuminatus). The almost identical Schooling Bannerfish (Heniochus diphreutes) is also a possibility, but the former has a more protruding snout with a more pronounced blackness on top of the snout and between the eyes.
Thanks a lot, I will entitle it simply as Bannerfish
Separate names with a comma.