I was making changes to my filter & pump today and one of my gold fish got
sucked into the intake of my pump. Actually, his side got stuck on the
intake. Fortunately, I knew something was wrong when I was watching my
fountain and it all of a sudden stopped. Anyways, the free got free and I
later found him. His left side, almost to his rear tail, is torn and part
of his insides are hanging out. I have separated him, but don't know what
to do for him, if there is anything. He is still mostly active. Any ideas?
Should I wait and see, or go put out of his misery, if he is in misery?

Thanks, Scott