Do you really know who you’re sharing the beach with? Purple sand dollars gobble bits of metal to stay grounded in turbulent ...

These spines are also a tell-tale way to see if a sand dollar is still alive. When in doubt, leave them be because there’s a hefty $500 fine for taking a live sand dollar off the Lowcountry shores.

Like all sand dollars, Echinarachnius parma is designed to live on the sandy bottom, using its little spines to move slowly around along with a set of tubed feet to filter out tiny plankton from ...