5 Free Photos of Pencil Urchin

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Pencil urchin among the coral
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Water macro close-up
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Red Pencil Urchin at Kure Atoll
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A red slate pencil urchin (Heterocentrotus mamillatus) on Midway's fringing reef
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A red slate pencil urchin (Heterocentrotus mamillatus) on Midway's fringing reef
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