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The Echinus melo or watermelon sea urchin -- sea urchins are small, spiny, globular animals which, with their close kin, such as sand dollars, constitute the class Echinoidea of the echinoderm phylum.

Fine Art Americafrom Fine Art America

Sea Urchins Canvas Print / Canvas Art by Greg Amptman

Sea Urchins

Mental Flossfrom Mental Floss

8 Strange Sea Creatures

the exquisite sea urchin - Coelopleurus exquisitus. This pic shows 2 urchins stacked