cnidarian

Noun
  1. Radially symmetrical animals having saclike bodies with only one opening and tentacles with stinging structures;
    They occur in polyp and medusa forms (synset 101912063)
    is a type of: invertebrate - any animal lacking a backbone or notochord; the term is not used as a scientific classification
    subtypes:
    • polyp - one of two forms that coelenterates take (e.g. a hydra or coral): usually sedentary with a hollow cylindrical body usually with a ring of tentacles around the mouth
    • medusa, medusan, medusoid - one of two forms that coelenterates take: it is the free-swimming sexual phase in the life cycle of a coelenterate; in this phase it has a gelatinous umbrella-shaped body and tentacles
    • jellyfish - any of numerous usually marine and free-swimming coelenterates that constitute the sexually reproductive forms of hydrozoans and scyphozoans
    • scyphozoan - any of various usually free-swimming marine coelenterates having a gelatinous medusoid stage as the dominant phase of its life cycle
    • hydroid, hydrozoan - colonial coelenterates having the polyp phase dominant
    • actinozoan, anthozoan - sessile marine coelenterates including solitary and colonial polyps; the medusoid phase is entirely suppressed
    belongs to: cnidaria, coelenterata, phylum cnidaria, phylum coelenterata - hydras; polyps; jellyfishes; sea anemones; corals
    has: coelenteron - the saclike body cavity of a coelenterate
    same as: coelenterate

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