Thanks guys - now please excuse my total ignorance in regards to guppies as I just went to my LPS and made the guy fish out of this huge tank a select few guppies.....
What defines/is a tuxedo guppy??? The blue boy is my absolute fave - most amazing stunning blue he is like 3 different shades of blue with metallic baby blue body on the top with HUGE tail compared to my other male guppies but I just don't know how to tell what they are and on that note I don't even know the different colour types at all :)