Coelenterates typically having alternation of generations; hydroid phase is usually colonial giving rise to the medusoid phase by budding: hydras and jellyfishes. Synonym: Hydrozoa.
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Words linked to "Class Hydrozoa" : Cnidaria, order Siphonophora, phylum Cnidaria, class, genus Sertularia, phylum Coelenterata, Coelenterata, Sertularia, hydroid, hydrozoan, Siphonophora, genus Hydra, Hydrozoa |
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