Heres one from the "My fish is swimming upside down" book
I have a tomato clown that has been in a well established tank for atleast 2 months. His only other tank mates are a PJ cardinal, and a Coral banded shrimp, and a few craps for cleanup.
Tonight I fed them, a small pinch of flakes that is almost completely gone in 5 minutes with the filters turned off. After the feed I was watching TV and looked over to see the colwn upside down. "choice words of dissapointment here"
As I watched him, he was struggling to stay upright, his little belly was fat and it appeared to be floating him upside down. He would fight it a little bit then flip over and bob upside down for a few seconds, I just checked on him, he seems better now, Ill check on him again in the morning.
But, I have to wonder, What the hell??? Is it possible that the food gave him gas? Just kinda wierd and I was wondering if any body had any experience with such a situation.