Their reproductive mode is fertilization and development in vivo. After the guppies are pregnant, they will mate with the males. When they mate successfully, the fish eggs will become fertilized eggs. The fertilized egg will develop in the mother for about 1 month, and then be born again. Although they are similar to viviparous, viviparous fish rely on the yolk in the body to provide nutrition, and there is not much connection with the mother.
In order for guppies to breed, breeders need to keep the water temperature of their lives constant. When they breed, they need to install a heating rod to keep the water temperature in a stable range.