We have a goldfish, a red & white ryukin our daughter named Dennis. He's been having problems swimming lately, and today we found him floating on his back, not moving. When I went to fish him out (if you pardon the expression) with the net, he woke up and began swimming around again.

So I did some research, and have decided that he has a swim bladder problem. And how do you cure an ornamental goldfish with a swim bladder problem?

Frozen peas.