+A sea urchin is a spiny, globe-shaped [Echinoderm](/wiki/echinoderm), found in oceans worldwide. These fascinating creatures move slowly using their tube feet and graze on [Algae](/wiki/algae) with a unique chewing apparatus. Their rigid, spherical shells, known as tests, are often prized finds on beaches.
+## See also
+- [Starfish](/wiki/starfish)
+- [Ocean Life](/wiki/ocean_life)
+- [Marine Biology](/wiki/marine_biology)
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