The Northumberland Straits separate Prince Edward Island from the mainland of New Brunswick. So the Northumberland appellation could fall under either New Brunswick or PEI jurisdiction. Either way, it’s not a great oyster. Harvested wild from the straits, it’s very mild in flavor, long and skinny and much bigger than other New Brunswicks, usually hitting at least four inches. According to Canadian fishery regulations, it’s graded standard, which is one grade below choice and one above don’t be a fool.