Nutrients like nitrogen and phosphorus are essential to all life. When excess nutrients end up in coastal waters (from stormwater, fertilizers, and other runoff), algae and seaweed can grow out of control. This can cause environmental problems like low oxygen and algal blooms. But, oysters can help! Shellfish such as oysters and clams feed on microscopic algae in the water—a single oyster can filter up to 50 gallons of water every day. At our lab in Milford, Connecticut, we wanted to see just ho