According to the book I have discribing the different strains of platies and swordtails, I beleive that is called a "Blue Mirror Platy" xiphophorus maculatus. It definately looks male to me. The book I have is titled "Swordtails And Platies" by Herbert Axelrod and Lothar Wischnath ISBN 0-86622-090-9. It has a lot of pictures and detailed info about the differences between the various Xiphophorus species both the wild ones and the standard pet store strains. Some of my Salt & Pepper platies have a fews of the shiney blue scales. Looks neat when they have them all over.