I have an orange sunburst platy who's exactly the same. I think it's just a different type of platy, like how they have mollies and then balloon mollies, ya know? I think you have nothing to worry about :) And I highly doubt you're overfeeding...
*Gonopodium is the male anal fin of a fish. In males, it is long shaped like a penis. In females, the anal fin is simply fanned out, making livebearers and other various fish easier to sex. Not always the case, though, like with rainbow sharks and some, if not all, catfish.
Last edited by Groovysunflowers; 10-15-2011 at 10:08 AM..