How to distinguish male and female black mollies

Speaking of the black mollies, I believe this is an ornamental fish that many friends like very much. It is shiny black all over and unique. It is a well-deserved black beauty among fish. Moreover, its body is spindle-shaped. It is a small tropical fish bred by hybridizing the black mollies and the dry highfin mollies. It has a gentle temperament and is easy to mix with other fish. All these factors combined make it no wonder that it is so popular. So how to distinguish the male and female of this black mollies? Let's learn about it together below.

1. First, let us introduce Mary fish:

It is native to Mexico in Central America. The golden species is called Golden Mary. Its albino species is also golden in color, but has red eyes. There are many artificially bred variants of the Mary fish, including the Black Mary, which has stable traits and has become an independent fish species, the Balloon Mary, whose abdomen is swollen like a balloon, and the Flytail Mary, whose tail fin is forked.

2. Morphological characteristics of Mary fish

The male Mari fish has a tall dorsal fin and a pointed anal fin, while the female fish has an average dorsal fin and a round anal fin. It is an ovoviviparous fish and generally does not require special care when giving birth. Each female fish can produce 20-50 fry at a time, and the fry can swim and look for food after they are born.

It is about 8-10 cm long and has a very gentle temperament. It never attacks other fish. It is omnivorous and loves to eat algae. It can be fed with broken green leaves of plants. It has a strong ability to adapt to water temperature, but is more sensitive to water quality and requires frequent water changes.

3. Finally, let me bring you today's question: how to distinguish between male and female Mary fish:

The mollies mature 35-45 days after birth. It is relatively easy to distinguish between males and females. Usually, male fish are relatively thin, with a flat hindquarters, swim quickly, and their anal fin has evolved into a rod-shaped copulation organ; the anal fin is rod-shaped and relatively pointed; the reproductive tube for extracorporeal fertilization: the female fish is relatively large in size, with a round abdomen and a fan-shaped anal fin. It usually appears swollen due to a large number of fertilized eggs in its body.

Male and female Mari fish can be distinguished at 2 months of age, and can reproduce after reaching sexual maturity at 4 to 6 months of age. There are many varieties of Mary fish, the main ones are Spoon-wing Mary, Mandarin Duck Mary, Red-wing Mary, Yellow-wing Mary, Silver Pearl Mary, Swallowtail Mary, Sail-wing Mary and Ball Mary. The pure color varieties are divided into Silver Mary, Golden Mary, Red Mary and Black Mary.