did a autopsy and no gill flukes (microscope use... YAY) its about 4.5" long, a member of four in my tank (had five but a previous tankmate ate it...) It was always unstable, hardly ate, always scratched against rocks and such, developed minor fin rot (or so it looked like) tried quarantining it but no treatments worked just continued to go downhill. So i euthanize d it but yeah i dont know why, i feed them prawns so i know occasional scratching is ok but this was constant to the point where the redness was showing. any thoughts or ideas? i can provide more details if required