Mooneye

Habitat Distribution

• Native across Canada from Quebec and the Great Lakes (excluding Lake Superior) west through the Hudson Bay drainage to central Alberta — first confirmed in the North Saskatchewan and Red Deer rivers in 1974.
• Core Canadian range sits in Manitoba: the Winnipeg River system, Red River, Assiniboine River, and Lake Winnipeg watershed are the most consistent producers.
• Prefer medium to large rivers with moderate current, plus connected lakes and impoundments — their distribution has contracted toward larger water over time, away from smaller tributaries.
• Also recorded on the St. Lawrence River, Ottawa River, Grand River (Ontario), and Quebec's Rivière des Prairies and Châteauguay River.

Key Locations

• Winnipeg River system, Manitoba — the most consistent mooneye fishery in Canada, with fish regularly exceeding 16 inches.
• Red River and Assiniboine River, Manitoba — both produce mooneye, often alongside goldeye in the same current seams.
• Lake Winnipeg, Manitoba — connected lake habitat that holds fish, particularly near river mouths and current-washed structure.
• St. Lawrence River and Ottawa River, Ontario/Quebec — catch records confirm mooneye presence, though they're less targeted here than in prairie rivers.
• North Saskatchewan River, Alberta — the western edge of the Canadian range; first confirmed records came from here and the Red Deer River.

Specific Spots

• Current seams and eddies in large rivers — mooneye hold where fast water meets slow, rising to surface insects the same way trout do in a tailout.
• Deep pools and backwater pockets off main current; they use these as staging areas, especially during midday when surface feeding slows.
• Rocky structure and bedrock humps in lakes like Lac du Bonnet — side-imaging sonar reveals these subtle features that hold fish in otherwise featureless water.
• Near the surface at dusk and into dark; their large eyes are built for low light, and that's when they feed most actively and visibly.