I recently got this small regal tang had him in a qt tank for a while then went into my main (65 gal) tank where i have 2 clownfish, the clowfish have been fine nothing wrong with them. I put the tang in the main tank june 22 and about 2 days ago i noticed that he had something on one side of his body, thought is was a scratch from hidding in the rocks at night but when i took a closer look at him he had some spots on him and looked pretty banged up, the clowfish mind their business and dont bother him. Since its my first time having a tang dont know how to fix this problem. Any help would be very much appreciated.