Cnidaria


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Noun1.Cnidaria - hydrasCnidaria - hydras; polyps; jellyfishes; sea anemones; corals
Metazoa, subkingdom Metazoa - multicellular animals having cells differentiated into tissues and organs and usually a digestive cavity and nervous system
cnidarian, coelenterate - radially symmetrical animals having saclike bodies with only one opening and tentacles with stinging structures; they occur in polyp and medusa forms
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; "in some species of coelenterate, polyps are a phase in the life cycle that alternates with a medusoid phase"
medusan, medusoid, medusa - 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
class Scyphozoa, Scyphozoa - coelenterates in which the polyp stage is absent or at least inconspicuous: jellyfishes
jellyfish - any of numerous usually marine and free-swimming coelenterates that constitute the sexually reproductive forms of hydrozoans and scyphozoans
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
Actinozoa, Anthozoa, class Actinozoa, class Anthozoa - a large class of sedentary marine coelenterates that includes sea anemones and corals; the medusoid phase is entirely suppressed
phylum - (biology) the major taxonomic group of animals and plants; contains classes
References in periodicals archive ?
07 Cnidaria Echiura Glottidia pyramidata Sipuncula Tubificidae Total 100 100 Southern kingfish %F %N %W IRI Bony fishes 24.
The 12th International Symposium on Fossil Cnidaria and Porifera will address corals and sponges through time and space, during the reef crisis in earth's history, bio-mineralisation, coral growth, biostrome forming and reef building from a micro-to macro scale.
Like corals and jellyfish, the sea anemone -- Nematostella vectensis -- is a member of the Cnidaria family, which is over 700 million years old.
Crustaceans associated with Cnidaria, Bivalvia, Echinoidea and Pisces at Sao Tome and Principe islands.
They are cousins in the same phylum, Cnidaria, named for specialized stinging cells.
The researchers also said that Dendogramma could be related to the jellyfish group of animals called Cnidaria or to another group called Ctenophora.
Among the topics are pending issues in the development and phylogeny of arthropods, from Cnidaria to "higher metazoa" in one step, basal metazoan sensory evolution, vertebrate Hox genes and specializations in mammals, and a food's-eye view of animal transitions.
I have developed a laboratory exercise in which students examine the Porifera (sponges), Cnidaria (jellyfish, etc.
According to the head of Lebanon's Professional Divers Association Mohammad Sarji, the jellyfish belongs to the Cnidaria family and has a jelly-like body resembling an empty plastic bag, which might sometimes fool humans.
Craig Venter Institute, along with more than 70 other researchers from around the world, have sequenced and analyzed the genome of Hydra magnipapillata, a fresh water member of the cnidaria -- stinging animals that include jellyfish, sea anemones and corals.