well, now that you mention it, maybe that's all it was... He was in a half gallon bowl with a little green plastic plant. I moved him to a one gallon yesterday with two small silk plants, and he did seem better once I moved him... his color is improving a bit, too. I also changed his water... I'm using treated tap water now instead of the Wal-Mart drinking water I was using, and I'm using MelaFix in his tank. The new tank also has a light in it which keeps the water warmer... I don't know what it was before, but I know it was cooler than what it is now, and it's 78 now. Maybe that's all it was... would that make his fins shriveled looking, too? That happens because of stress, right?
What still has me stumped, though, is the ventral fins. I can't figure out why they are turning black, and why that black part sometimes turns white. Any ideas on that?