Walleye is a game fish that is found in North America. It is a popular food fish and is often eaten by people. Some people are wondering if walleye is high in mercury. Mercury is a metal that can be harmful to human health. It can cause damage to the brain, heart, and other organs. Some fish contain high levels of mercury, and it is important to know which fish are safe to eat. The Minnesota Department of Health has compiled a list of fish that are low in mercury and fish that are high in mercury. Walleye is on the list of fish that are high in mercury.