The term 'Geoduck' is a type of CLAM that is native to the Pacific Northwest region of North America. It is the largest burrowing CLAM in the world and can live up to 150 years. Its scientific name is Panopea generosa, and it is also known as the 'king CLAM'. Geoducks are highly sought after for their sweet, briny flavor and are often served in sushi dishes. They are also harvested for their shells, which are used to make jewelry and other decorative items.