Oysters themselves are incredible for the environment: They filter up to forty gallons of water per day, a process that cleans the water of impurities like carbon and nitrogen, which find their way into the water from runoff and lawn fertilizers. During my first visit to the farm the previous summer, Shore had impressed me with the fact that because there are now so many Island Creek oysters on the bottom of Duxbury Bay, the bay itself is completely filtered every nine days.
