Purple+Sea+Urchin

 The Purple Sea Urchin's **common name** is the Purple Sea Urchin. It's **scientific name** is //Strongylocentrotus// //purpuratus// and their **class** is Echinoidea. The Purple Sea Urchin can be found off thewest coast of **North America, in the Pacific Ocean,** usually live in the intertidal zone down to only depths of 33 feet. For them to live they need to eat things like dead fish, sponges, mussels, barnacles, algea, and anything decaying. The sea urchin's name comes from an old English word for spiny hedgehog.Purple Sea Urchin's can grow new "teeth" if one of them brakes.
 * from Canada to theBaja peninsula.** These guys can get up to about **3 1/4**
 * inches across, and 1/3 inches long**. Purple Sea Urchins

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References: //@http://www.enchantedlearning.com/subjects/invertebrates/echinoderm/Purpleseaurchin.shtml// //@http://library.thinkquest.org/J002608/urchin.html//  //[|YouTube]//  []