what type of tang?

[ssheipel]

Henry, and all, hello.

I bought this tang -- photo attached (sorry for the blur but he's a fast guy). He's quite small (maybe 3.5 inches from nose to tail), so is a juvenile.

He was sold to me as from the Indo Pacific and of the Genus Ctenochaetus ("like a yellow eyed Kole.")

But I'm wondering if he's not of the Genus Acanthurus (perhaps nigroris -- given the black dot at the start of his tail fin, or even nigrofuscus as I've seen several of those coloured much like this guy)?

It's only important in as much that I hope to add another tang to my aquarium and want to avoid the same types of tangs -- assuming that will assist with mitigating aggression.

Thanks for your help.

steve