Hi all. I absolutely love Bluegills and their close relatives. I have some wild caught in a 100 gallon aquarium. It's legal to have them, believe me, I checked. Moving on... two of them have pink colored lips with a little flesh wound. Is this a disease that someone knows of, or is this fish getting rowdy with one another? They're definitely territorial and aggressive, so I'm not sure if these guys just got hurt. Help please?