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Cnidaria

en.wikipedia.org/wiki/Cnidaria

Cnidaria is a phylum containing over 10,000 species of animals found exclusively in aquatic ... Some, however, omit either the polyp or the medusa stage. .... the polyp and medusa forms, or of zooid...

polyp and medusa Facts, information, pictures | Encyclopedia.com ...

www.encyclopedia.com/topic/polyp_and_medusa.aspx

polyp and medusa names for the two body forms, one nonmotile and one typically ... In such organisms the polyp, by budding, gives rise to medusae, which either ... the polyp exists, as in the hydra and the sea anemone, the organism has the ...

Chapter 26: Sponges, Cnidarians, Flatworms, and ... - Glencoe

www.glencoe.com/sec/science/ose/bdol2005/ca/docs/chap26.pdf

You will identify and compare and contrast the ... Although sponges do not resemble more familiar animals, they carry on the same ..... Polyp form has a tube -shaped body with a mouth surrounded .... either the polyp or medusa stage. Polyps ...

Invertebrates | List, Characteristics of Invertebrates | Biology ...

biology.tutorvista.com/organism/invertebrates.html

The main characteristic that separates invertebrates from other organisms is the ... Cnidarians exhibit two basic body forms called polyp and medusa. ... Habitat - They may be aquatic either marine or fresh water; or terrestrial; free-living and ...

Cnidaria, Marine Aquariums and Coral Reef Aquarium Tank, Stand ...

www.aquarium-design.com/invert/cnidarian.html

All Cnidarians (anemone like organisms) share a similar body plan. ... of Cnidarians exists as either a polyp or medusa that help taxonomists identify them . ... They may occur as microscopic attached forms, or be fifty feet long and live in the ...

Phylum Cnidaria: Hydra

www.william-hogarth.de/PhylumCnidaria.html

Many members of the phylum exist only in one form or the other. ... Compare this organism with that that of Metridium, a marine polyp known as a sea anemone ( Perry & Morton, Fig. 90c) ... Can you identify the gastrodermis and epidermis? ... A container of small organisms (either the multicellular arthropod Daphnia or the  ...

sponges & cnidarian notes b1 - Biology Junction

www.biologyjunction.com/sponges__cnidarian_notes_b1.htm

Corals, hydra, & sea anemones exist in the polyp form as adults. CORAL POLYPS. Medusa forms are usually free-swimming, bell-shaped animals with tentacles ...

Cnidarians - Acadia's Oceanside Meadows Inn

www.oceaninn.com/wildlife/cnidarians.htm

2 days ago ... The nematocyst is fired either by the tentacle touching prey, or in some ... In the Medusoid form, the organism is essentially upside-down, with the mouth and ... Most hydroids alternate between a polyp and a medusa stage, although ... They exist only in the polyp stage and obtain their food by filter feeding.

Cnidarian Structure and Function - Advanced | CK-12 Foundation

www.ck12.org/book/CK-12-Biology-Advanced-Concepts/section/15.9/

Both polyp and medusa forms consist of a digestive sac, the coelenteron, surrounded ... Medusae are usually free-swimming and either propel themselves using ... This hydrostatic pressure allows the animals to hold their shape without bones ... Most anthozoan species exist exclusively in the polyp form and do not exhibit ...

Can a Jellyfish Unlock the Secret of Immortality? - The New York ...

www.nytimes.com/2012/12/02/magazine/can-a-jellyfish-unlock-the-secret-of-immortality.html

Dec 2, 2012 ... The "immortal jellyfish" can transform itself back into a polyp and begin life anew. ... depending on their stage in the life cycle, resemble either a jellyfish or a soft coral. ... Among the hundreds of organisms he collected was a tiny, relatively .... A Turritopsis medusa, however, sinks to the bottom of the...

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The Anemones, Corals and Jellyfish (Phylum Cnidaria)

www.earthlife.net

4)Two different forms exist, medusa and polyp ... The Cnidaria (pronounced nidaria)as a group of animals are well known to many people under ... The Cnidocyst has either a modified flagellum called a Cnidocil, or a cone as a sensory trigger.

Chapter 3: Phylum Cnidaria

www2.hendrix.edu

develop a mouth, hypostome and tentacles, then drop off and form ... Gonionemus is structurally like the Obelia medusa, except that the broken ... asexual polyps and sexual medusae--some may have either .... Intriguing possibilities would exist if we could acquire that .... Be able to identify the organism and know it is.

Cnidaria

www.mesa.edu.au

Our oceans are teeming with life - from microscopic animals to enormous ... There are two major body forms among the Cnidaria - the polyp and the medusa. Sea anemones and corals have the polyp form, while jellyfish are typical medusae. ... These individuals (called zooids) can either be directly connected by tissues or ...