I thought it a very interesting question, Peace. And my thanks to "Guest" for the link to the answer. I assumed that Goldfish would need to but didn't know for sure.
Strangely, I have a Betta fish that is doing very, very poorly. May not make it past the weekend and I know it might sound strange to some people, but it hurts me not to do more for him. I've changed his water and put a little tonic salt in but still he is losing the battle. Today there was even a little white scaley thing on his head.
I feel so powerless and I'm supposed to be his guardian. Yes, he's a fish-- he's also a living thing that's my responsibility. Whoever said that you can't get attached to fish, hasn't met me...
Take care of your farting goldfish, Peace. You never know when their health could deteriorate. :(