Curious, where was this fish?
The juvenile thing is throwing me off, but I wonder if it might be a Lieutenant tang (Acanthurus tennentii).
http://www.marinecenter.com/fish/tangs/tennentitang/
The powder blue, particularly around the tail spine, and the splash of yellow around the eye. But they don't have the stripes like this one does, but I don't know if that's a juvenile coloration thing.
If it is a tennentii that's very cool. You don't seem to see them come up too often. Every now and again they do. I'm hoping to find one for my 280g down the road. It's that or an Achilles.. which-ever I can find first I guess.
