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I don't know... The common here its "Melilita isometra" and "
I find often these organisms washed on the beach, they are alive, they move.
Sand dollars live beyond mean low water on top of or just beneath the surface ...
at most 3 inches in diameter (of the live specimens I saw)
Keyhole urchin, more commonly referred to as a sand dollar. Approximately 5" ...
These animals are found in shallow seawater below tide lines, where they burrow ...