This is an absolutely stunning mixed pair, large Deep Blue Cobalt (almost 6.0″) with smaller Red Turquoise (5.5″). The strains are perfectly compatible and the fry should be excellent quality. They are very fertile. This is only the second time they spawned (the first was in a community tank), and the spawn resulted in a very large group of wigglers. Please look at the pictures. I am sure you will agree this is a fantastic pair!