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Sand Dollars (echinoderms) in the sand at Pismo State Beach, Central California

Sand Dollars (echinoderms) in the sand at Pismo State Beach, Central California

PISMO BEACH, CA - APRIL 14, 2007: Sand Dollars (echinoderms), both alive (purple) and dead (white), line the sands of this state beach. (photo by Ian Shive/Aurora)