noun🔗ShareHydrozoenAny 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. "Beim Schnorcheln im flachen Riff sahen wir eine Vielzahl bunter Hydrozoen, darunter einige, die wie kleine Bäume aussahen, die an den Felsen befestigt waren.animalorganismbiologyoceanChat with AIVocabulary GamePractice Reading