Language English Laurentian Maple Forest Photo: Biodôme OngletsDescriptionDistinguishing features The lake whitefish has an elongated body and a small head. Its back is greenish brown and its flanks silvery. It has large scales and a forked tail. Reproduction Spawning occurs in fall, in shallow water close to shore, over gravel bottoms, at a temperature of 6ºC. A female weighing 1 kg may lay up to 20,000 eggs. The eggs hatch in April or May. Diet Lake whitefish eat mostly molluscs, insects and crustaceans. They also sometimes eat plankton, small fish and fish eggs. They are bottom-feeders. Predators Their enemies are lake trout, northern pike, walleye, burbot and, in the Great Lakes, lamprey eels. They are also fished by humans. Habitat Lake whitefish frequent cold water in lakes. In summer, they live under the thermocline (the layer of water where the temperature drops suddenly), while they are found at different depths from fall through to spring. Ecology, behaviour This is a very important commercial species in Canada. Habitat destruction and overfishing are largely responsible for the decline in lake whitefish stocks across the country. French nameGrand corégone Scientific nameCoregonus clupeaformisPhylumChordataClassOsteichthyes (bony fish)OrderSalmoniformesFamilySalmonidaeSizeLength: 38 cmWeight1 kgLife span15 years or longer In the north: 40 yearsStatusNot determined; fished for sport and commercially.