Hello, I wonder if anyone could advise me what to do with my Lionhead fish. It has been living life upside down for at least 6 months. Sometimes it hangs near the surface, other times lays on the bottom. I have tried all sorts of remedies you can buy from aquatic shops but nothing has made a difference. My other fish are fine, but this fish is now finding it difficult to eat as he can't much control his swimming. His quality of life is poor and i'm wondering if and how you can euthanize fish, cause I feel it is cruel to leave him as he is. Any suggestions welcome.