Fertilization is external, producing free-living planula larva.

外受精，能产生自由活动浮虫。

In the adult, or medusa stage of a jellyfish, they can reproduce sexually by releasing sperm and eggs into the water, forming a planula.

海蜇成或水母阶段，它们通过将精子和卵于释放到水中形成浮而进行有性繁殖。