The eastern oyster is the same species that fed pilgrims at Plymouth Rock? While the Pacific oyster has taken over much of the world, America’s native oyster still represents nearly two-thirds of our domestic harvest. Because they flourish in a wide variety of conditions (from Long Island Sound to the Gulf of Mexico), oysters vary in taste and are often identified by the regio in which they were harvested. Varieties of oyster include the popular Blue Point, Chincoteagues, Apalachicolas, Cape Cods and several others. Most oysters are about 3 to 4 inches in length.