Junonia is one of the rarest shells to find. It's highly coveted among beachcombers. Because Junonia snails live on the ocean floor, their shells aren't likely to wash up on the beach. Once a Junonia dies, its shell is more likely to stay buried than to travel the 60 to 150 feet to the sand.
Hundred-eyed cowrie shell (Cypraea argus) The hundred-eyed cowrie shell species is one of the rarest seashells in the world. You will be lucky to spot this unusual sea jewel feeding whilst diving or snorkeling shallow coral reefs.
The State of Florida has outlawed the collecting of live shells on the island. Live shell is defined as any specimen containing an inhabitant, whether or not the mollusk seems alive. The law also protects sand dollars, starfish, and sea urchins.
Seashells are so important to the islands' chain of life that the State of Florida has outlawed the collection of live shells (with inhabitants) as well as living sand dollars, starfish and sea urchins. Shellers are encouraged to limit their empty-shell haul.
Sand dollars can be found on most all the beaches of Sanibel Island. They are loved by shell collectors for their intricate designs, symmetrical shape and beautiful colors. Sand dollars most favorable living habitat is the shallow waters of beaches or shallow muddy estuaries.
All beaches have shells, but some of the best beaches for shells in Florida are located on the Gulf in southwest Florida. Sanibel Island is the most famous, and deservedly so.