Hydrozoa
coelenterates typically having alternation of generations; hydroid phase is usually colonial giving rise to the medusoid phase by budding: hydras and jellyfishes • Syn: class Hydrozoa • Hypernyms: class • Member Holonyms: Cnidaria, phylum Cnidaria, Coelenterata, phylum Coelenterata • Member Meronyms: hydrozoan, hydroid, genus Hydra, Siphonophora, order Siphonophora, Sertularia, genus Sertularia
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