How Do Black Mollies Mate?
The Basic Mating Behavior of Black Mollies Black mollies are part of a class of fish known as “live bearers.” The females of the fish that fall into this class keep their fertilized eggs inside their bodies until they hatch, at which time they are released as fry. When black mollies mate, the male will transfer milt, the fluid that contains his sperm, into the female’s body using is gonopodium. The gonopodium is a special anal fin that is shaped like a rod rather than a normal fin. Distinguishing Between Male and Female Mollies Distinguishing between male and female black mollies is fairly simple. The males will have the gonopodium instead of a normal anal fin. Females tend to look larger and rounder than males. Some males will have elongated dorsal fins, but this is not seen on the females. Mating and Egg Development Black mollies do not pair off when they mate. The males will fertilize any females they come in contact with, and they will even try to fertilize females that have alread
