Really hard to tell from the pic because of the blue, but it looks like the scales are raised . Is there red near the base of the scales? If so, probably as Adam [MENTION=7697]LAreefguy[/MENTION] said, bacterial. Hate to diagnose without a better pic, but that is my 2 cents..
bacterial can be relatively easy to treat in a QT. penicillin would make quick work..... BUT......... confirm first with better pics...