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。
FOUR NEW SPECIES AND TWO NEW RECORDS OF HYDROZOA FROM THE NORTHERN OF SOUTH CHINA SEA AND ITS ADJACENT WATERS,CHINA (CNI南海北部近海水螅虫总纲四新种和二种新纪录研究(刺胞动物门,自育水母纲,水螅水母纲)