I been thinking about getting back into keeping some of the types of Molly fish again. I had always like a molly fish and they come in most any color that there is.
I used to have a lot of them, a few years back. Had one molly one time that had 190 some young at one time. She was in an aquarium with only a male at a time.
Molly Fish is a live bearing fish, as most peoples know. They usually have young every 6 to 8 weeks. I am told that they will have young every month. That may or may not be true.
It is also possible for Molly Fish to change sex. If you got a tank full of females and your male(s) Molly die, the biggest female will turn into a male. I had never seen this happen but I had read about it happening.
I have a vast numbers of books on tropical fish, that I go to for information, when I need it. These books are all wrote by peoples that had study tropical fish for many years.