One of the best things about breeding guppies is the endless number of possibilities that it affords you.  As more mixed guppies get added to the outdoor guppy pond, new and exciting color combinations emerge.  These guppies are pulled at random to add a splash of color to any aquarium that needs it.  This batch of mutt guppies came from the following lines of guppies: Red Mosiac Dumbo Halfmoon, Red Chili Mosaic, 24K Gold, Blue Galaxy and Black Moscow.  Although this creates perfectly healthy fish, the offspring are sometimes sterile and will not produce babies. Other guppies from this pond are fully functional and ready to breed.