Jellyfish are free-swimming members of the phylum Cnidaria.

水母是腔肠动物部的成员。

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Actually, the term coral is much broader and refers to most of the animals in the class Hydrozoa of the Phylum Cnidaria.

其实珊瑚一词所指的动物甚多，包括大多数属珊瑚虫纲及数动属水螅虫纲的刺胞动物。

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Jellyfish are free-swimming members of the phylum Cnidaria . They are found in every ocean, from the surface to the deep sea.

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。

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