The Yucatan sailfin molly has an overdeveloped dorsal fin. A black variety exists,
but it is less common than the "gold"; the latter is rather incongruously named,
since it is practically an albino, as its red eyes imply. Breeding is straightforward,
and even easier if you raise the temperature a few degrees. The females can produce
up to 100 fry. Size: 15 cm.