as others have said, unless you know the source of the fish...where the lfs got it from and can find out from them what it is (and that's assuming they're a reputable breeder/seller/importer) then you'll never know for sure exactly what it is.
most people simply refer to them as "pet store red devil" which implies the likelihood that it is a cross of a midas (citrinellum) and red devil (labiatum).
most people simply refer to them as "pet store red devil" which implies the likelihood that it is a cross of a midas (citrinellum) and red devil (labiatum).