Some tropical fish are one birth, but some are not. Some of these ovoviviparous fish are themselves fertilized internally and give birth directly to larvae. Usually, after fertilization, they will not give birth at one time, so they will give birth several times, such as guppies, Mary fish and so on, all belong to this category, after mating once, they can give birth three times. In addition, there are some very rare situations that can lead to fish not giving birth at one time, such as the mother's physical weakness.
1, guppy: guppy is a relatively common tropical fish, its male and female body shape and color are very different, the male fish is relatively thin, only 3-4 cm, the female fish can grow to about 6 cm. Because of its gentle temperament, lively and active, it can be mixed with other small tropical fish. In addition, this kind of fish has strong adaptability, can survive in low temperature of 16 C and dirty water quality, and is very easy to raise.
2. Mary fish: Mary fish is a small tropical fish of the genus Cyprinodon of the family Cyprinodon. It originally inhabits lakes or ditches. It has strong resistance to pollution and can survive in waters with low dissolved oxygen. It usually feeds on algae and organic debris. The fish is fertilized internally, and the female can store mirrors, so it can reproduce in several litters.
3, Moonfish: Moonfish is a common species of tropical fish, it and guppies, small and exquisite and bright colors. This kind of fish is about 4-6 centimeters long, has strong adaptability and reproductive ability, and can be hybridized with swordtail fish to breed some new varieties. There are many kinds of them, such as red moonlight, blue moonlight, red fin golden moonlight and golden head moonlight.
