Coral reefs are rocklike structures built by layers of coral organisms, called polyps.
珊瑚礁由珊瑚组织(珊瑚虫)层层相

,类似岩石。
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力量-巴勃罗·毕加索 
秘

实验室 In addition to their characteristics, in these cnidarians, there's the leap of the formation of a third layer of tissue during development, from the polyp state to certain jellyfish, such as some that belong to the taxon of hydromedusae.
除了它们
特征,在这些刺胞动物之间,在发育过程中,还有第三层组织形成
飞跃,从息肉状态到某些水母,比如一些属于水螅纲
水母。

》趣味科普(精选双语)