以上来源于: WordNet
N any of the marine invertebrate animals constituting the phylum Echinodermata, characterized by tube feet, a calcite body-covering (test), and a five-part symmetrical body. The group includes the starfish, sea urchins, and sea cucumbers 棘皮动物门海洋生物
These small, spiny echinoderms are found in oceans all over the world.
这些小的，多刺的棘皮动物能够找到在全世界的海洋。
But echinoderms apparently deliver more carbon to the sediments than do forams, for example.
举例来说，棘皮动物传送到海底的碳明显比有孔虫多。
Popularlyknown as starfish, sea stars are actually echinoderms, closely relatedto sea urchins and sand dollars.
海星实际上是棘皮动物，和海胆和饼海胆是近亲。
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