The black Mary fish is a kind of ornamental fish that is relatively easy to mix. Their character is docile, aggressive is not strong, in the water tank with sufficient space and food, basically will not conflict with other fish. They are also not large, growing to 7-12cm as adults. Therefore, they can be mixed with many small fish, such as traffic light fish, moonlight fish, zebrafish, other species of Mary fish, triangle lamp fish and so on.
Black Mary fish and guppies can grow in weakly alkaline water, and can grow well in water around 24 degrees Celsius. They can eat artificial fish food, or small aquatic insects and vegetables. And their size difference is not big, personality is also more docile, not easy to attack each other. Therefore, it is entirely feasible to put these two kinds of polyculture together.
Black Mary fish is not suitable and parrot fish mixed culture. Because the adult parrot fish can grow to about 20 cm, much larger than the black Mary fish. Moreover, parrot fish are very territorial and will actively attack other fish that invade their territory. If the black Mary fish and parrot fish are placed in the same tank, the black Mary fish is likely to be attacked.
