planula

Fertilization is external, producing free-living planula larva.

体外受精，能产生自由浮浪幼虫。

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

海蜇成体体阶段，它们通过将精子和卵于释放到中形成浮浪幼体而进行有性繁殖。