EDIT:
This post http://www.fishforums.net/index.php?showtopic=228422&st=20 describes exactly the problem (oddly the angelfish in the picture has identical markings and size..).
I'll just isolate the guy in a breeding net and starve him for a few days.
This post http://www.fishforums.net/index.php?showtopic=228422&st=20 describes exactly the problem (oddly the angelfish in the picture has identical markings and size..).
I'll just isolate the guy in a breeding net and starve him for a few days.