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Purple sea urchin can refer to one of several species of sea urchin:
Arbacia punctulata, a species of sea urchin from the family Arbaciidae commonly known as the Atlantic purple sea urchin
Paracentrotus lividus, a species of sea urchin in the family Parechinidae commonly known as the purple sea urchin
Strongylocentrotus purpuratus, a species of sea urchin in the family Strongylocentrotidae commonly known as the purple sea urchin
Topics referred to by the same term
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This disambiguation page lists articles associated with the title Purple sea urchin.