In scyphozoan jellyfish, the free-swimming medusa form is the dominant stage, with the sessile polyp form found only during larval development.
自由游泳的水母见于各海,常见的沿海岸线漂流的盘形动物(甲壳动物)。
In the adult, or medusa stage of a jellyfish, they can reproduce sexually by releasing sperm and eggs into the water, forming a planula.
在海蜇成体或水母体阶,通过将精子和卵于释放到水中形成浮浪幼体而进行有性繁殖。
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Eventually the polyps begin to bud, splitting off into an ephyra, or immature jelly, which then develops into a medusa, the form we usually recognize as a jellyfish.
最后,珊瑚虫开始萌芽,分裂成蝶状体,或者水母体发育成水母体,也就是常认为的水母的外形。
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