Do guppies give birth to live young?

Yes, guppies give birth to live offspring, making them viviparous. They are one of the most popular and commonly known livebearer species in the aquarium hobby. Female guppies have the ability to store sperm for a long period after mating. When the female is ready to give birth, she goes through a gestation period that can last from 21 to 30 days. During this period, the eggs develop internally, receiving nourishment from the mother's body.