This term refers to any oyster that is cultivated either entirely or partially in the waters surrounding Long Island. It is often assumed that this designation indicates a particularly delicious variety, such as the Blue Point. However, the flavor of oysters can vary significantly depending on the salinity and other factors present in the waters where they are grown. As a result, oysters from Long Island waters can exhibit differences in taste, ranging from mild to strong and even having a distinct coppery flavor.