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Walleye

Walleye: One of North America’s Most Popular Game Fish

The Walleye (Sander vitreus) is a cool-water freshwater fish native to North America and one of Canada’s most recognizable gamefish. Its large reflective eyes, sharp teeth and golden-olive colouring make it easy to distinguish from many other freshwater species.

Ontario waters support widespread populations, particularly throughout the Great Lakes basin and Northern Ontario. The species inhabits everything from large lakes and reservoirs to rivers, rocky Canadian Shield waters and stained-water systems.

Walleye belong to the Percidae, or perch, family. Their relatives include Yellow Perch and Sauger.

Identification

Several physical characteristics make this species relatively easy to recognize.

Adults have an elongated body with an olive-green to brown back that gradually becomes lighter along the sides. Yellow and gold tones often give the fish its characteristic appearance.

Common identifying features include:

The white tip on the lower portion of the tail provides one of the easiest ways to distinguish a Walleye from the closely related Sauger.

Their large eyes aren’t just useful for identification. They also play an important role in how these predators hunt.

Where Are They Found?

The natural range covers a large portion of North America.

Within Ontario, populations occur throughout the province and are particularly common in Northern Ontario and the Great Lakes basin.

Suitable waters include:

The Ontario Freshwater Fishes Life History Database describes the species as native, common and widespread throughout the province.

That broad distribution makes it one of Ontario’s most accessible and economically important sport fish.

Preferred Habitat

Walleye adapt to an unusually wide range of freshwater environments.

Ontario reports populations in conditions ranging from cold, clear water to warm, weedy and stained water. Bottom types can range from soft mud to rock, rubble, bedrock and flooded timber.

Productive habitat commonly includes:

The Ontario Freshwater Fishes database classifies the species as a cool-water fish and gives a preferred temperature range of approximately 19–23°C (66–73°F).

Light also strongly influences habitat selection. Their eyes work particularly well under reduced-light conditions, allowing these predators to function effectively in stained water and during periods of low light. Ontario notes that they commonly avoid bright conditions and become more active around morning, evening and cloudy weather.

Diet and Feeding

Young fish begin by consuming relatively small aquatic organisms.

As they grow, fish increasingly become predators and begin relying heavily on other fish.

Their diet can include:

The exact diet varies considerably between lakes and rivers.

Forage fish can have a major influence on population growth and abundance. Ontario fisheries management research specifically identifies small forage fish such as Yellow Perch and Cisco as important food sources.

Large adults can become highly efficient fish-eating predators.

Size and Weight

Size varies according to habitat, food availability, age and population characteristics.

Ontario lists a typical length of approximately 35.5 to 58.4 centimetres (14 to 23 inches) and a typical weight of around 0.68 to 1.36 kilograms (1.5 to 3 pounds).

Larger specimens occur regularly in productive waters.

The Ontario Freshwater Fishes database lists an adult range of approximately 30.5 to 76.2 centimetres, with a maximum reported length of 107 centimetres.

Ontario’s official species page lists the provincial record at 10.1 kilograms (22.3 pounds).

Fish weighing several pounds are common in many productive Ontario waters, while trophy-sized individuals can grow considerably larger.

Lifespan

These freshwater predators can live for decades under favourable conditions.

The Ontario Freshwater Fishes Life History Database lists a lifespan of approximately 12 to 26 years.

Males generally mature earlier than females. The database lists male maturity around three to four years and female maturity around four to five years, although environmental conditions can influence growth and development.

Northern populations often experience slower growth because of shorter growing seasons and colder water.

Spawning and Reproduction

Spawning occurs during spring shortly after winter conditions begin to disappear.

Ontario’s freshwater database lists April through June as the spawning period, with water temperatures ranging approximately from 4–11°C (39–52°F).

Adults migrate toward suitable spawning areas that can include:

Good water circulation plays an important role. Wave action and river current help keep eggs supplied with oxygen.

Unlike species such as Bluegill and Crappie, adults don’t build or guard nests.

Females release their eggs across suitable rocky substrate while males release milt nearby. The fertilized eggs settle into spaces among rocks and gravel, where they continue developing.

A female can produce a remarkable number of eggs. Ontario’s freshwater database lists approximately 22,000 to 615,000 eggs, depending largely on the size of the female.

Behavior and Seasonal Movement

Light, water temperature, food and spawning activity all influence movement.

Spring brings adults toward shallow spawning areas. After reproduction, they disperse into feeding habitat.

As summer develops, fish can occupy weed edges, rocky structure, deeper water and open-water areas containing concentrations of forage.

They don’t always remain close to the bottom. Individuals can suspend in the water column when following schools of baitfish.

Low-light conditions often increase feeding activity. Dawn, dusk, cloudy weather and stained water can provide favourable conditions because their highly developed eyes give them an advantage over prey.

Fall brings cooling water and increased feeding opportunities before winter.

Under the ice, populations remain active and continue feeding throughout the colder months.

Walleye vs. Sauger

Walleye and Sauger are closely related and can look remarkably similar.

Both have elongated bodies, sharp teeth and large eyes. They can also occupy similar lake and river habitat.

Several characteristics help distinguish them.

The tail provides one of the easiest clues. Walleye have a noticeable white tip on the lower portion of the tail, while Sauger lack this prominent white marking.

Sauger generally display darker blotches or saddle-like markings across their bodies. Adult Walleye usually lack those distinct dark body markings.

The dorsal fin provides another clue. Sauger typically have noticeable dark spots on the first dorsal fin.

Size can also help. Walleye generally grow considerably larger. Ontario’s freshwater database lists a maximum Sauger weight of about 3.97 kilograms, compared with much larger maximum sizes for Walleye.

Walleye vs. Yellow Perch

Walleye and Yellow Perch belong to the same Percidae family, but their appearance and size differ considerably.

Yellow Perch typically have a bright yellow or golden body marked by several prominent dark vertical bars.

Adult Walleye lack those distinctive bars and grow substantially larger.

Both species have spiny dorsal fins and occupy many of the same lakes.

Their ecological relationship is also interesting. Yellow Perch can form an important part of the diet of larger Walleye.

Why Do Their Eyes Reflect Light?

The large eyes that give the species its name provide an important predatory advantage.

Their vision works particularly well under reduced-light conditions. That helps them locate prey in stained or turbid water and during periods when sunlight is limited.

This adaptation helps explain why activity often increases around dawn, dusk, cloudy weather and nighttime.

It also influences where fish position themselves during bright conditions. Individuals living in clear lakes may seek deeper water, shade or structure during periods of intense sunlight.

Ontario fisheries management information identifies light intensity as an important factor affecting distribution and feeding behaviour.

Fishing for Walleye

Walleye support one of Ontario’s most important recreational fisheries. Ontario describes them as the province’s most popular gamefish.

Anglers pursue them throughout the open-water and ice-fishing seasons.

Common presentations include:

Jigging and trolling rank among the most widely used approaches.

Low-light periods can provide excellent opportunities because fish frequently become more active around sunrise, sunset and cloudy conditions.

Ontario fishing seasons, possession limits and size restrictions vary by Fisheries Management Zone and individual waterbody, so anglers should always check the current regulations before fishing.

Interesting Facts

The scientific name is Sander vitreus.

Another common Canadian name is Yellow Pickerel, although Walleye aren’t true pickerel. The Ontario Freshwater Fishes database lists “yellow pickerel” as an alternative common name.

They belong to the Percidae family, making them relatives of Yellow Perch and Sauger.

Walleye are native to Ontario and occur throughout the province.

Their large eyes provide excellent vision under low-light conditions.

Adults can live for more than two decades.

Females can produce hundreds of thousands of eggs during a spawning season.

Unlike Bluegill and Crappie, adults don’t guard their eggs after spawning.

Ontario’s provincial record weighs more than 22 pounds.

Their adaptability allows populations to thrive in waters ranging from clear Canadian Shield lakes to stained rivers and large Great Lakes systems.

Frequently Asked Questions

Are Walleye native to Ontario?

Yes. They are native and widespread throughout Ontario, with particularly strong populations in Northern Ontario and the Great Lakes basin.

Why are they called Walleye?

The name refers to their large, reflective-looking eyes, which help them function effectively under low-light conditions.

Are Walleye and Pickerel the same fish?

In Canada, people commonly use pickerel or yellow pickerel as another name for Walleye. However, true pickerel belong to the pike family Esocidae, while Walleye belong to the perch family Percidae.

What do they eat?

Adults primarily prey on fish, although their diet can also include aquatic insects, crustaceans and other available organisms. Yellow Perch and Cisco can provide important forage in Ontario waters.

How big do they get?

Typical Ontario fish measure approximately 14 to 23 inches and weigh around 1.5 to 3 pounds, although much larger individuals occur. Ontario’s record weighs 22.3 pounds.

Where do they live?

They inhabit lakes and rivers throughout Ontario. Suitable habitat ranges from clear rocky lakes to stained water, vegetated areas, river pools and large Great Lakes systems.

When do they spawn?

Spawning generally occurs during April through June as water temperatures reach approximately 4–11°C.

Do they build nests?

No. Adults broadcast their eggs over suitable rocky and gravel habitat rather than constructing and guarding nests.

How long do they live?

Ontario’s freshwater fish database lists a lifespan of approximately 12 to 26 years.

What’s the difference between Walleye and Sauger?

Look at the tail and body markings. Walleye have a distinctive white tip on the lower tail, while Sauger generally have darker body markings and spots on the dorsal fin. Walleye also typically grow much larger.