My fiancé and I have 2 female guppies and one of them has been acting strange for the last 2 days. (Not eating, staying at the bottom, being less active, etc)
We came home today and noticed one of them had a lump like thing on her. (we don't think it's normal?) Here is a picture of her http://imgur.com/GIqA98B
Can anybody tell us what this is and what can be done? She has been up around the top of the tank since we got home.