noun🔗Share水螅纲动物 Any of many colonial coelenterates, of the class Hydrozoa, including the hydras, hydroids, hydrocorals, and siphonophores."While snorkeling in the shallow reef, we saw a variety of colorful hydrozoans, including some that looked like tiny trees attached to the rocks. "在浅滩的珊瑚礁浮潜时，我们看到了各种各样色彩鲜艳的水螅纲动物，包括一些看起来像附着在岩石上的小树。animalorganismbiologyoceanChat with AIVocabulary GamePractice Reading
