Hi all. I have a yellow Mickey Mouse Platy, female, that I got about 2 months ago, along with another platy. Everything has been great until this last week.....she started to lose weight very suddenly, although she eats like a pig. She looks for food a lot of the time, even after she has eaten - but the weight loss continues. The best way I can describe it is that her underside is flat now, almost concave in appearance. She does seem to be working harder at swimming, but not horribly bad. If it weren't for the weight loss, I doubt her swimming would have worried me much at all. Anyone have any ideas on this? I'm stumped....all the other fish are fine. Her scales, eyes, mouth everything look fine, albeit skinny. Thanks for any help you can give me! Jenni