mates fish died on sunday
swimming fine in the morning, normal behaviour
that afternoon laying on the bottom upright and twitching a bit , no gill movement
brought it to me monday morning for an autopsy
sadly it had been frozen so makes an autopsy difficult
outside of fish didn't show any visible signs of trauma or damage
fat healthy looking fish
opened gut
appears to be a massive amount of fat in surrounding the organs
kidney seemed damaged on outer edges but that may have been caused by freezing