Sabrina Geraci-Gee, Stony Brook University. Learn all about the hard clam and other bivalves of Long Island! Hard clams, oysters and scallops are common bivalves of Long Island. Besides being delicious to eat, bivalves provide important ecosystem services, such as water filtration, nutrient cycling, reduction of costal erosion, and maintaining biodiversity. Come learn about bivalve anatomy through live dissections and water filtration demonstrations. You can even take a closer look under the microscope at your favorite bivalve and take home a bivalve shell as a souvenir.