i dont think it will get infected or any thing but i have never had this hapen befor (if you guys think it will let me know). all that happend was he got in a minor fight when he tried to get in one of my fishes homes that tat the other fish dug out a while back and the fish did not respond well. so i ges my question is, is it bad. all i know is a cloudy fin is not good. he is not eating any less so thats not a problem.