The Sander vitreus, commonly known as the walleye, is a freshwater fish native to North America. Recognized for their large, reflective eyes, walleyes are well-adapted to low-light environments. They inhabit lakes and rivers, often hiding in deep, cool waters during the day. Walleyes are nocturnal predators, feeding on smaller fish and aquatic invertebrates. Their olive-green to golden hue, along with a distinct white tip on their tails, makes them easily identifiable. Walleyes play a crucial role in aquatic ecosystems as both predator and prey, contributing to the balance of their aquatic habitats.

Sander vitreus, commonly known as the walleye, is native to North America. It is primarily found in the freshwater systems of the United States and Canada. The geographical distribution includes the Great Lakes region, the Mississippi River basin, and extends as far north as the Hudson Bay watershed. This species is prevalent in states such as Minnesota, Wisconsin, and Michigan, as well as Canadian provinces like Ontario and Manitoba.

The walleye typically inhabits freshwater lakes, rivers, and reservoirs. It prefers environments with clear, cool waters and abundant aquatic vegetation. The species is often found in deeper waters during daylight hours, moving to shallower areas at night to feed. Walleyes thrive in waters with a temperature range of 10-25°C (50-77°F), although they can tolerate a wide range of conditions.

Walleye are carnivorous fish, primarily feeding on smaller fish such as yellow perch. They play a crucial role in maintaining the balance of aquatic ecosystems by controlling the population of their prey. Walleyes are adapted to low-light environments, with highly developed eyes that allow them to hunt effectively in murky waters and during nighttime. This adaptation gives them a competitive advantage over other fish species in similar habitats.