Medusa Jelly Fish (Below)
During a Jellyfish's life cycle, they experience an alternation of generations. One generation, called the medussa, reproduces sexually. Another Generation, called the polyp, reproduces asexually. The medusa form is the dominant and most recognized form of the jellyfish nowadays.
Overall, the basic stages
in the life cycle of a jellyfish include:
Jellyfish reproduce sexually, meaning that adult jellyfish are male or female. Gonads, are the reproductive organs of both sexes.
The gonads in males produce sperm, while females produce eggs. When jellyfish are ready to mate, the male releases sperm through its mouth opening located on the underside of its bell. The fertilization of eggs in the female jellyfish depends on the species.
In some species, the female's eggs attach themselves to brood pouches located on the upper part of her oral arms surrounding her mouth. Through the swimming process, chances that a female swam through sperm fertilizes it. the eggs are kept in the mouth and the male's sperm swims into her stomach, where it fertilizes the eggs. The fertilized eggs later leave the stomach and attach themselves to the female's oral arms.
After the fertilized eggs have went through the process of embryonic develoment, they hatch. The free-swimming planulae that are born then leave the female's mouth or brood pouch and set out on their own.