Went out today to West lake Toho to a section of the lake that was very shallow with lots of activity going on. I was in about a foot of water or less in some areas. There were many Gambusia affinis, Lucania goodei, Fundulus chrysotus, Poecilia latipinna, some tadpoles, and many sunfishes which I couldn't ID because they were too fast to catch. There were many male and female Poecilia latipinna with melanistic spots including an almost completely melanistic specimen that I spent almost 20 minutes chasing after. Below is a pic of the almost completely melanistic sailfin and the others with "light spots". How rare is the almost completely dark specimen in the wild? I have never seen one like this in nature.

I wonder if some domestic strain black sailfin or "chocolate-chip" mollies might have been released there in years past and influenced the gene pool.

I haven't seen any like that ,beautiful though

I wonder if some domestic strain black sailfin or "chocolate-chip" mollies might have been released there in years past and influenced the gene pool.

It is possible. This is an enormous lake with houses everywhere. There could be many exotic pet fishes that have been released into there over the years.