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But starfish—as well as sand dollars and sea anemones—have radial symmetry, with identical segments of their body radiating out from a central point.

Echinoderms are a group of animals including starfish, sea urchins and sand dollars, all of which have a five-part symmetric body layout.

The impressive exhibit features shells the size of small dogs, adult hand-sized sand dollars, giant horseshoe crab domiciles, column-like shells, leather corals, square sea stars and other curiosities among thousands.

Gift shops sell furry bison figurines, and sand dollars are etched with bison silhouettes.

“People from Aptos find all kinds of stuff washed up on that beach, like horse teeth or fossilized sand dollars,” she said.