Complex sentence: Walleye ("Sander vitreus ", formerly"Stizostedion vitreum") is a freshwater perciform fish native to most of Canada and to the northern United States.a North American close relative of the European pikeperch.
Split into simpler sentences: Walleye ("Sander vitreus ", formerly"Stizostedion vitreum") is a freshwater perciform fish native to most of Canada and to the northern United States. It is a North American close relative of the European pikeperch.