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The Phylum Cnidaria includes such diverse forms as jellyfish, hydra, sea anemones, and corals. Cnidarians are radially or biradially symmetric, a general type of symmetry believed primitive for eumetazoans.
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animaldiversity.ummz.umich.edu/site/accounts/informatio...
animaldiversity.ummz.umich.edu/site/accounts/information/Cnidaria.html
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Many cnidarian species exist in two different body forms during their life cycle: the free-swimming form, called the medusa (a jellyfish for instance), and the stationary form called the polyp (which resembles a tiny sea anemone). ... Learn more about Cnidaria in "Life on the Move" ... Website links about Cnidaria...
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www.pbs.org/kcet/shapeoflife/animals/cnidaria.html
www.pbs.org/kcet/shapeoflife/animals/cnidaria.html
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The exclusively aquatic phylum Cnidaria is represented by polyps such as sea anemones and corals, and by medusae such as jellyfish. A polypoid or a medusoid cnidarian is a radially or biradially symmetrical, uncephalized animal with a single body opening, the mouth.
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tolweb.org/tree?group=Cnidaria&contgroup=Animals
tolweb.org/tree?group=Cnidaria&contgroup=Animals
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The phylum Cnidaria, formerly called Coelenterata* , contains the hydras , sea anemones , corals and jellyfish . ... They are radially symmetrical* animals, with one end of the body bearing the mouth and tentacles. Some live attached with the mouth directed upwards; others are free-swimming with the ... Unit: Cnidaria...
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www-biol.paisley.ac.uk/courses/Tatner/biomedia/units/cn...
www-biol.paisley.ac.uk/courses/Tatner/biomedia/units/cnid1.htm
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Cnidaria - Wikipedia, the free encyclopedia
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Cnidaria (pronounced /naɪˈdɛəriə/ with a silent c ) is a phylum containing over 9,000 species of animals found exclusively in aquatic, mostly marine, environments. Their distinguishing featur...
en.wikipedia.org/wiki/Cnidaria
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An introduction to the biology, classification and ecology of anemones, corals and jellyfish the phylum Cnidaria ... Characteristics of Cnidaria:-; 1)Radially Symmetrical. 2)Body multicellular, few tissues, some organelles. 3)Body contains an internal cavity and a mouth. 4)Two different forms exist, medusa and polyp ;
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www.earthlife.net/inverts/cnidaria.html
www.earthlife.net/inverts/cnidaria.html
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Members of the Phylum Cnidaria include the Anemones and are grouped with the soft and hard corals and the hydroids. Cnidarians all have a life cycle of two forms. One is a free-swimming jellyfish medusa stage and the second is an attached polyp stage.
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www.mesa.edu.au/friends/seashores/cnidaria.html
www.mesa.edu.au/friends/seashores/cnidaria.html
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Cnidaria is a large phylum composed of some of the most beautiful of all the salt and freshwater organisms: the true jellyfish, box jellyfish, coral and sea anemones, and hydra. Although Cnidaria is an incredibly diverse group of animals, there are several traits that link them together.
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www.angelfire.com/mo2/animals1/phylum/jellyfish.html
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