Moscow-Purple: The color under lighting is dark purple almost black in some of them. A very nice strain. The original strain did not have as big of a dorsal as the one shown on the two pictures on the left. They had short dorsal but through the years I improved the size of their dorsal. The Moscow guppy strains are known by their dark purple, blue, red, black and greens; through their whole bodies. Some of them show a little white on their chests.