Hydrozoa
n. [无脊椎] 水螅纲
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。
There were totally 41 species, among which were 35 species of Hydrozoa, 4 species of Scyphomedusae and 2 species of Ctenophore, respectively.
共记录到水母类4 1种,其中水螅水母35种,钵水母4种,栉水母2种。主要以近岸低盐类型为主,高盐种类少并且出现时间短。