sick kole tang??

[christyf5]

Hey guys,
So I decided to get myself a kole tang. They are pretty cool looking fish and I thought it would be interesting to have a bigger fish in the tank (currently its goby mania). Anyway, I've had the fish for just over a week now and I noticed it has developed what looks like a rubbed off area on its skin. I figured with all the darting around it does maybe it got excited and sideswiped a rock or something. But today I'm looking at the fish again and it has it on the other side too and on its head between its eyes? What is this? Is it bacterial? DOes any one have any idea what I am talking about?? I've never really dealt with tangs before. I did do a fair bit of research on him before I bought him but I didn't do any research on the diseases they get, unfortunately. I'll try to post a pic but he's pretty quick.

TIA
Christy [img]smile.gif[/img]