Most CBB's Come with flukes, which doesn't sound like what yours has... but hopefully you can get it into a QT and dose PraziPro... Keep a close eye on it... and after 15 mins or so gently brush it with a turkey baster with a fine point... and squirt it a few times... see if it detaches... if it has flukes look for the CBB to show u signs like they would to a cleaner shrimp by giving dark spot signals to where flukes are... it was pretty neat when I first got my CBB and treated it before putting it into the display...
80%+ of all CBB's in stores have flukes and need to be treated before putting them in your tank. This is usually the cause of CBB death and as easy as it is to treat, not many ppl seem to know about this... I just wish LFS's would step up and treat them all individually before selling them, or just STOP BRINGING THEM IN! Or even better yet, only bring them in via special orders and only to those that have done their proper research before buying them. (not meaning any offense to the originial OP,) I understand impulse buying we have all been guilty of it at one point or another but the LFS's should train their staff better to avoid these situations.
Here are a couple of pics of my healthy CBB going on a year in my tank now...
