coral hydranth的用法和样例：
例句
- 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。 - Soft coral polyps differ from hard coral polyps in that they have eight tentacles while hard corals have multiples of six.
柔软的珊瑚虫不同于硬珊瑚虫，前者有八条触须而硬珊瑚虫达到软珊瑚虫触须的六倍。
