That pretty much sums it up. It's 6 bars so it's A. triostegus (Hawaiian convict).Went back and forth on that with evolved. He can shed more light on it than I can but because they just started importing from Mauritius less than a year ago and because it has 6-bars vs. 9-bars, it can't be Acanthurus polyzona.
I looked at a bunch of pictures of the Hawaiian endemic convict tangs and found a few pictures where a convict had those markings but it was very few and far between (see, e.g., HERE). Cool fish and I wish my convicts had those markings!![]()