#hydrozoan__hydroid  colonial coelenterates having the polyp phase dominant
  supertype:  coelenterate__cnidarian  radially symmetrical animals having saclike bodies with only one opening and tentacles with stinging structures; they occur in polyp and medusa forms
  subtype:  hydra  siphonophore  sertularian
  member of:  class_Hydrozoa__Hydrozoa  coelenterates typically having alternation of generations; hydroid phase is usually colonial giving rise to the medusoid phase by budding: hydras and jellyfishes
     member of:  phylum_Cnidaria__Cnidaria__Coelenterata__phylum_Coelenterata  hydras; polyps; jellyfishes; sea anemones; corals
        member of:  subkingdom_Metazoa__Metazoa  multicellular animals having cells differentiated into tissues and organs and usually a digestive cavity and nervous system
           member of:  kingdom_Animalia__Animalia__animal_kingdom  taxonomic kingdom comprising all living or extinct animals

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