hydroid

Noun
  1. Colonial coelenterates having the polyp phase dominant (synset 101914480)
    is a type of: cnidarian, coelenterate - radially symmetrical animals having saclike bodies with only one opening and tentacles with stinging structures; they occur in polyp and medusa forms
    subtypes:
    • planula - the flat ciliated free-swimming larva of hydrozoan coelenterates
    • hydra - small tubular solitary freshwater hydrozoan polyp
    • siphonophore - a floating or swimming oceanic colony of polyps often transparent or showily colored
    • sertularian - feathery colony of long-branched stems bearing stalkless paired polyps
    belongs to: 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
    same as: hydrozoan

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