Lake Superior other Great Lakes fish, populations have also been affected by the accidental or intentional introduction of foreign species such as the sea lamprey and Eurasian ruffe. Accidental introductions have occurred in part by the removal of natural barriers to navigation between the Great Lakes. Overfishing has also been a factor in the decline of fish populations. Lake Superior Lake Superior (; ), the largest of the Great Lakes of North America, is also the world's largest freshwater lake by surface area, and the third largest freshwater lake by volume. The lake is shared by the Canadian province of Ontario to
Lake Kozhozero Lake Kozhozero Lake Kozhozero () is a freshwater lake, located in the south of Onezhsky District of Arkhangelsk Oblast in Russia. It is one of the biggest lakes in Arkhangelsk Oblast and biggest one in Onezhsky District. The area of the lake is , and the area of its basin is . Lake Kozhozero is the source of Kozha River, which is a left tributary of the Onega River and thus belongs to the White Sea basin. The lake is located in the remote area and is not connected to the outside world by any all-season roads. It is notable