Well to give a little history, I added a 2nd false perc to my tank about 2 weeks ago. Right after adding the 2nd one to the tank it instantly went to its side showing the other it was dominant. I was checking out my tank last night and noticed the bigger one of the two was looking a little chubby and has an area on her chest that is alot darker (almost black) then the rest of her. The only thing that I can think of is she is about to drop some eggs. Is this something that happens this fast or is there a different explanation for the bulge and dark spot?