A comprehensive group equivalent to the true Cœlenterata, i. e., exclusive of the sponges. They are so named from presence of stinging cells (cnidae) in the tissues. See Coelenterata.
Phylum which includes very primitive, carnivorous animals with stinging tentacles. Cnidarians may appear as a sessile polyp (as seen in hydroids and sea anemones) or as a floating medusa (as characterized by jellyfish). Anyone who has ever been swimming in the Chesapeake Bay is familiar with the phylum Cnidaria because of the abundance of of sea nettles in the summer months. The Chesapeake Bay is also home to many other cnidarians, including beautiful sea anemones.
A phylum comprising four taxonomic classes: Hydrozoa (hydroids), Cubozoa (sea wasps and box jellies), Scyphozoa (jellyfish), and Anthozoa (corals and sea anemones). Hydroids are considered the most primitive of the four classes; the other three classes probably evolved from hydroids. Scyphozoa spend most of their lives in the medusa stage, while Anthozoa spend most of their lives as polyps.
phylum of aquatic invertebrates (formerly called Coelenterata) that includes Hydra, jellyfish, sea anemones, and corals. These animals have stinging cells on their tentacles and can occur in different body forms. They may be free-swimming medusa and/or attached polyps hydroids).
An animal phylum that includes hydra, sea anemones, jellyfish, and hydrozoan colonies. These aquatic organisms have stinging cells (known as cnidae) that exist on the tentacles of the coral polyp and assist the polyp in capturing zooplankton that are passing by in ocean currents.
a scientific group of animals that have stinging cells, known as cnidae, present on their bodies.
hydras; polyps; jellyfishes; sea anemones; corals
A phylum of invertebrate animals comprising the sea anemones , corals , jellyfish , and hydroids.
SNID-air-ee-a An animal phylum whose members have a hollow two-layered body, with a jellylike interior and radial symmetry. 510, 516
phylum, encompassing corals, sea anemones, jelly fish, and colonial hydroids. These groups used to be included with the ctenophores (comb-jellies) in Phylum Coelenterata, but cnidarians and ctenophores are now regarded as distinct phyla. Cnidarians are the simplest true metazoans, although they have more organized cells than do poriferans (sponges).
A phylum of animals that contains jellyfish, sea anemones and coral polyps.
CnidariaThis article is partially based on a translation of the corresponding German-language Wikipedia article, retrieved on 27th April 2006. (IPA: Silent c - from New Latin cnida, from Greek κνιδη "nettle", "sea anemone" (Dalby, 2003: 296).) is a phylum containing some 11,000 species of relatively simple animals found exclusively in aquatic, mostly marine, environments.