The Blue Maculatus is a North American livebearer related to and in the same genus, Xiphophorus, as the swordtails. Most commercial strains of platies have mixed heritage, including ancestors from X. helleri, X. maculatus and X. variatus. This particular platy is primarily descended from X. maculatus. Males often reach 4cm (1.5 in.). Females are somewhat larger and much heavier. Both sexes have iridescent blue bodies, although males tend to be more brightly colored. Some fish have a blush of red below and in the dorsal fin. This fish has no natural range, but of its ancestors hail from Mexican and Central America.