Hawaii’s Four Seasons Resort Hual?lai can now lay claim to some of the freshest oysters around. Under the leadership of David Chai, the resort’s director of natural resources, the hotel spearheaded the Oyster Growing Habitat, which produces organic oysters in a sustainable environment. Over the past 12 years, Chai tested different varieties of oysters to see which ones were best suited for the resort’s saltwater Punawai Lake. After choosing the Crassostrea virginica variety (native to the Chesapeake Bay area o…