variatus platy
xiphophorus variatus latin

The two species, the southern platyfish and the variatus platy, have been interbred to the point where they are difficult to distinguish.

The variatus platy (Xiphophorus variatus), also known as variable platyfish or variegated platy, is a species of freshwater fish in family Poecilidae of order Cyprinodontiformes.

The variatus platy (Xiphophorus variatus), also known as variable platyfish or variegated platy, is a species of freshwater fish in family Poecilidae of order Cyprinodontiformes.

For example, while it has an XY format, the Xiphophorus variatus also has a second Y chromosome, known as Y', that creates XY' females and YY' males.