Cnidarians

What is a What is a Cnidarians?Cnidarians?

The phylum contains thousands of living species worldwide.The phylum contains thousands of living species worldwide.The cnidarians include :The cnidarians include :

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"http://www.factmonster.com/ce6/.html." The Columbia Electronic Encyclopedia.© 1994, 2000-2006, on Fact Monster.© 2000–2007 Pearson Education, publishing as Fact Monster.31 Mar. 2010 <http://www.factmonster.com/ce6/sci/A0839602.html>.

Many thousands of cnidarians species Many thousands of cnidarians species live in the oceans, live in the oceans, from the surface to the bottom.from the surface to the bottom.

HydroidsHydroids,,

AnemonesAnemones

CoralsCorals

JellyfishJellyfish,,

The free-swimming "jellyfish" stage in a cnidarians life cycle. The other stage is the sedentary “polyp" stage.

A sessile, or nonmotile, organism. polyps are the sea anemone and the freshwater hydra.

Stan & Debbie Hauter. "Dori Corell's Pink Tube Anemone." Stan & Debbie Hauter. "Dori Corell's Pink Tube Anemone." http://z.about.com/d/saltaquarium/1/0/j/W/1/dcorellpinkanemone_600.jpghttp://z.about.com/d/saltaquarium/1/0/j/W/1/dcorellpinkanemone_600.jpg

Jellyfish Pictures. Photograph. http://www.funny-potato.com/jellyfish.html

Hedgehog Hydroid Photo, Hydractinia Milleri.“

http://www.oceanlight.com/spotlight.php?img=1036http://www.oceanlight.com/spotlight.php?img=1036

The Coral Kingdom Collection/NOAA. Nationalgeographic- Coral Anthozoa. The Coral Kingdom Collection/NOAA. Nationalgeographic- Coral Anthozoa.

http://s.ngeo.com/wpf/media-live/photos/000/005/cache/coral-reef_507_600x450.jpghttp://s.ngeo.com/wpf/media-live/photos/000/005/cache/coral-reef_507_600x450.jpg

The Columbia Encyclopedia Sixth Edition.The Columbia Encyclopedia Sixth Edition.

http://www.ville-ge.ch/mhng/hydrozoa/intro/topology.gifhttp://www.ville-ge.ch/mhng/hydrozoa/intro/topology.gif

Aurelia Life CycleAurelia Life Cycle. Web. . Web.

http://cas.bellarmine.edu/tietjen/images/myaurelia.gifhttp://cas.bellarmine.edu/tietjen/images/myaurelia.gif

Aiptasia Biology. By Www.berghia.net, INSTAR, 2010. Web <http://www.berghia.net/pics/IM004064aiptasia1.jpg>.Aiptasia Biology. By Www.berghia.net, INSTAR, 2010. Web <http://www.berghia.net/pics/IM004064aiptasia1.jpg>.

The NOAA Photo Library -Scyphozoans - JellyfishThe NOAA Photo Library -Scyphozoans - Jellyfish. Web. <http://earlham.edu/~meckehe/scyphozoajellyfish.htm>. . Web. <http://earlham.edu/~meckehe/scyphozoajellyfish.htm>.

Academic Dictionaries and Encyclopedias -HydrozoaAcademic Dictionaries and Encyclopedias -Hydrozoa. Web. <http://en.academic.ru/dic.nsf/enwiki/217443>.. Web. <http://en.academic.ru/dic.nsf/enwiki/217443>.