Sedentary shellfish like quahogs and oysters are filter feeders. They feed on plankton and particles in the water column. Known for the "ecosystem services" they provide in the form of water filtration, they also support important inshore fisheries. Grazers like urchins and periwinkles are mobile, meandering along rocky surfaces nibbling on algae and kelp. Our boat will feature oysters, quahogs, sea urchins, and periwinkles.