Scientifically called Poecilia Sphenops, this fish known as Molly, belongs to the Poeciliidae family, which live in the area of Mexico and the United States. Generally this species tends to live in groups, usually in running waters that are in constant movement.
These molly fish, present a sexual dimorphism, that is, the females are much larger than the males, measuring between 7 and 11 centimeters, while the male Molly barely reach 5 centimeters in length. Similarly, the dorsal fin of the male fish is much more developed than that of the female and its anal fin has become its reproductive genital organ.
These minnows are characterized by being of different ranges of colors, depending on the species, origin and sex. One of the most common varieties of these animals is the melanic, that is, they are absolutely black. Although it is a quite beautiful and striking variety, it is much more sensitive and delicate than the rest, and requires much more care since they are quite prone to certain diseases.
If you are thinking of having one of these animals in your aquarium, you should know that the aquarium should not have any decorative items or plants that contain wood, since this makes the water pH falls below 7, which will be quite harmful and harmful to the animals. It is important that you remember that in the aquarium that houses these animals, you must place plants that can withstand the presence of salt in the water. In the same way, it is very important that you keep in mind that the temperature of the water in your pond, for the Molly fish to develop and live properly, must be between 25 and 28 degrees Celsius.