Hey hey hey, don't go to euthanasia immediately. I had a blue gourami get her tail neatly cut off (I still to this day have NO idea how it happened) and was planning to send her onto the rainbow bridge but I didn't want to kill her. She was my baby. So I decided to let her pass on her own. She didn't she grew it back and lived for a while longer until finrot got her while I was on vacation. I still miss her.... Anyway, back to what I was saying. Don't think he will die 100%.