Despite its common name, not all wild males of this species develop the full sail-like dorsal fin. The pure wild form of the species is hardly ever seen within the hobby. Instead, cultivated color varieties or, more often, fertile hybrids between sailfins and two of their closest relatives — Poecilia sphenops (Sphenops Molly) and P. velifera (Yucatan Molly)—are seen.
Now to one of the more spectacular members of this family, the sailfin molly. There are three species of sailfin molly of which two are common in the hobby, Poecilia latipinna and Poecilia veli-fera. As with the cultivated platies and sword tails, they have been hybridized over the years to develop more colour varieties.