What is shelling? It’s looking for buried treasure on the seashore. Shelling is a popular pastime on Sanibel Island, and it’s easy to see why: The island’s unique geography makes finding and collecting these buried treasures easy and especially fun. It’s easy to understand what is shelling. In Sanibel Island and the rest of Southwest Florida, shelling is combing the seashore and beach, looking for the perfect seashells. The seashells...