I put these three species of fish on the same topic, mainly because they belong to the same fetal fish of the family Medaka, and the size and habits are not much different.
The common swordtail is the red sword, and there are quite a few varieties of artificially bred mutants, such as gaofan, double sword, as well as black tail sword, red and white sword, etc.
Crescent fish, also known as moonlight fish, variants are also rich in color, but rarely seen with sword tails, the main feature is the black spots on the tail handle, and some black spots are in a mickey-shaped pattern.
Morley fish, also translated as Mary fish, is commonly black, gold and silver, as if there is no red Oh. There are also varieties such as spherical short body and high fin. Note that the red balls sold in aquarium shops are actually red moonlight fish without Mickey spots on the tail handle.
The three brothers, whose hometown is in Mexico and Central America, prefer hard, weak alkaline water quality, are very adaptable to the environment, like to eat algae on the leaves of aquatic plants, and they are no problem with polyculture with other small tropical fish, and they will not bully other fish. They reproduce extremely easily, almost once a month. Males and females are also easy to distinguish, and males have evolved fins and are smaller than females.
N years ago, there was a XX laundry detergent advertisement made by Lang Ping on the TV, and the background fish tank was raised in these varieties, which looked more attractive than the laundry detergent!
