Harbor seals have increased significantly in Narragansett Bay in recent decades, due primarily to enactment of the federal Marine Mammal Protection Act in 1972. The winter population of these animals numbers about 250 (Save The Bay 2000); during colder months, they can be seen hauled out on rocks throughout the Bay. The seals have become the foundation for ecotourism activities; Save The Bay and the Rose Island Lighthouse Foundation, in particular, host winter “seal watch” tours out of Newport.