fish swims upside down

Question
I have a gold fish that for that past several months has been swimming upside down.  It seems to be healthy but it won't swim like other fish. What's wrong with it?

Answer
Hi Mel;

Poor guy. He probably has a swim bladder malfunction related to constipation. Here is a link to info about it as well as treatment options (You may have to scroll down past the ads);

http://www.petplace.com/fish/when-your-fish-can-t-swim/page1.aspx

I hope he feels better soon.....

At Your Service;
Chris Robbins