胞门，汉语词汇，医学名词，即子宫口。
而有的则认为它们是刺胞动物，这是包括现代的海葵和海蜇在内的一门动物。
Others, though, believe they were Cnidarians, the group that includes modern sea anemones and jellyfish.
水母是刺丝胞动物门的一员，它们的足迹遍布每一个海洋，无论是在海面还是深海区，我们都能看到它们的身影。
Jellyfish are free-swimming members of the phylum Cnidaria . They are found in every ocean, from the surface to the deep sea.
新的谱系分析显示，它应该代表刺胞动物门中的一个原始类群。
A new phylogenetic analysis suggests that this rare early Cambrian anthozoan be among the primitive crown cnidarians.
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