Known for its splendid array of gastropod fossils, Florida is home to many fossil shell species in abundance. The nature of finding a gastropod fossil in a shell pit usually means that it will be heavily weathered and seriously damaged. Certainly, delicate features of the shell are almost always missing. What is most unique and exciting about this fossil specimen of the extinct, left-coiling gastropod Sinistrofulgur grabaui is that all the anatomy is still intact and well-preserved. The interior is still filled with the original fossil shell matrix of the pit from which it was collected. This complete and very high-grade fossil specimen came from a prehistoric sea snail that lived 5 million years ago, crawling around the ocean floor when the massive Megalodon shark was still alive, terrorizing the waters off the southeastern Atlantic coast of prehistoric North America. This remarkable gastropod fossil is recommended for its immense display appeal.
Sinistrofulgur grabaui is a member of a unique sub-genus Sinistrofulgur of left-coiling snails. This sea snail lived during the Pliocene / Pleistocene Period and was a predatory marine creature that fed mainly on bivalves by attaching itself to its prey with its foot and slowly rasping a hole in the shell of its unfortunate victim. Sinistrofulgur could move great distances and could go against tidal currents with the use of its powerful foot.