Planulae

Fertilization is external, producing free-living planula larva.

外受，能产生自由活动的虫。

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

在海或水母阶段，它们通过将子和卵于释放到水中形而进行有性繁殖。