VIRGINIA BEACH, Va. -- A bag of 1,000 spat, or baby oysters, has filtered a tub of Lynnhaven River water after only an hour. The oysters are a prop for an oyster gardening class taught to Hampton Roads teachers. The oysters in the tub demonstrated how oysters clean the water -- an adult-sized oyster can filter up to 50 gallons of water a day. (U.S. Army photo/Kerry Solan)
VIRGINIA BEACH, Va. -- One hour after a bag of baby oysters were placed in a fish tank with water from the Lynnhaven River, you can see how the filtering system works with these bivalves.