Mermaid coins or sea biscuits: Here's the scoop on sand dollars

Shaunda Roberts's Instagram, Twitter & Facebook on IDCrawl

See millions of years of history while beachcombing in San Francisco, Sand Dollars

Shaunda Roberts's Instagram, Twitter & Facebook on IDCrawl

Tarini Fernando

Shaunda Roberts's Instagram, Twitter & Facebook on IDCrawl

Hermit crabs: The social animal that will help its peers come out of their shells (by force)

Jeff Clements's Instagram, Twitter & Facebook on IDCrawl

Hermit crabs: The social animal that will help its peers come out of their shells (by force)

Shaunda Roberts's Instagram, Twitter & Facebook on IDCrawl

Mermaid coins or sea biscuits: Here's the scoop on sand dollars