In the late nineteenth century Great South Bay provided many of the
clams consumed throughout the region and even the country. The first
oysters to be exported from the US to Europe came from Great South Bay. The Great South Bay has, at least since the end of the Ice Age, been home to many generations of horseshoe crabs. By the latter 20th century, a significant percentage of the habitat was lost.
Hurricane Sandy in 2012, the largest storm to affect the region since
1938, made landfall with devastating impact to Fire Island seashores, including multiple breaches. The largest of these was at
Old Inlet, south of Bellport. Residents were concerned it would have effects on tidal increases and potential flooding, but it has allowed the bay to relieve some of its captive water, which has improved the salinity and nitrogen levels in the bay. After roughly 75 years, the bay began flushing itself out which may improve the water condition within the bay. Regulations set forth by the US Government National Wildlife Preserve, which has a seven-mile stretch of land (the
Otis Pike Fire Island High Dune Wilderness) prohibit any unauthorized parties from performing any kind of man-made changes, thus the inlet has remained open. There have been a number of ongoing public meetings discussing the future of the Inlet. All the other breaches were closed by the Army Corps of Engineers. In 2012, The Save the Great South Bay (STGSB) not-for-profit organization was formed in order to work towards better conservation of the water and its beachfronts. Save The Great South Bay has raised awareness of boat sewage dumping in The Great South Bay as a serious ecological concern. == Folklore ==