Language English Photo: Biodôme OngletsDescriptionDistinguishing featuresThe walleye has a long, stocky body. It is olive brown, flecked with dark yellow on the back and paler yellow on the flanks. It has a black spot at the base of its first dorsal fin, which is also spiny. It has a large mouth and sharp teeth, and large, shiny eyes. ReproductionThese fish reach sexual maturity at three to eight years, depending on their environment and sex. They spawn in spring or early summer, in shallow running water that is well oxygenated, over gravel bottoms. The female produces up to 612,000 eggs at a time. DietThey are not choosy eaters, feeding on a wide variety of fish, amphibians and even small mammals. They feed when light levels are low, to protect their sensitive eyes. PredatorsThe enemies of the adults are northern pike, muskellunge and humans. The young are eaten by many different kinds of fish. HabitatWalleye live in large lakes and rivers and shallow rivers, preferably in turbid water. Ecology, behaviourSome stocks of walleye have suffered dramatically from acid rain and toxic waste accumulating in the lakes where they live. Overfishing and destruction of spawning grounds also threaten the species. French nameDoré jaune Scientific nameSander vitreusPhylumChordataClassOsteichthyes (bony fish)OrderPerciformesFamilyPercidaeSizeLength: 30 to 50 cmWeight0.9 to 1.7 kgLife span10 to 12 years in the south and up to 20 years in the northStatusCommon species; fished for sport.