Hello i'm just wondering if anyone can help I have a beautiful bala shark and I have noticed a pinkish round growth around it's mouth. I have tryed to find what it might be but no luck from what I have read. still eating and seems to be in good health other than the growth from it's mouth. There are no other marks on it's body and the other fish in the tank are doing well, no marks or other signs of infection. If anyone has had this problem or can help in anyway I would appreciate it very much!