Sea Urchin

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Sea urchins are spiny, hard-shelled creatures that live on rocky seafloor on different depths, from shallow waters to great depths. Description from kimmode123.blogspot.com. I searched for this on bing.com/images Black Sea Urchin, Life Under The Sea, Water Life, Reef Tank, Aquatic Animals, Sea Urchin, Arte Animal, Ocean Creatures, Black Sea

Sea Urchin Sea urchin, any of about 950 living species of spiny marine invertebrate animals (class Echinoidea, phylum Echinodermata) with a globular body and a radial arrangement of organs, shown by five bands of pores running from mouth to anus over the test (internal skeleton). The pores accommodate tube feet, which are slender, extensible, and often sucker-tipped. From nodules on the test arise long, movable spines and pedi cellariae (pincer like organs); these structures may have poison…

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