Poecilia spec. "Rio Morichal, El Salto, Venezuela 1996", Karl Mayerhofer & Norbert Svardal

The day before she gave birth to around 30 fry
Notice the more pointed anal fin (gonopodium) on the male specimen and the dark "gravid spot" on the female specimen

First colours starts to show up
First black spots and markings starts to show up on the body of the males