Five-holed Keyhole Urchin

Keyhole Urchin – Mellita quinquiesperforata

A living five-holed keyhole urchin is exposed on the beach at low tide. Photo by Gerhard H Image Source What does a keyhole urchin look like? A keyhole urchin, also called a sand dollar, has a very simple flat, round, body. On the top of its body, five lines come together in a point to …

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