It has a greyish-green back, with medium-sized off-white spots, some reddish-orange on fins, and a light belly. It is a sleek, fast swimmer, with lots of teeth in its mouth.
Lake trout live in lakes in northern North America. They used to be fished commercially in the Great Lakes until the populations dwindled and made the fishing unfeasible by the 1950s.
They have a longer lifespan than rainbow trout and can live up to 20 years old. They start reproducing when 6 to 8 years old. Maximum sizes range from 17 to 27 inches (43 to 70 cm) to 50 inches (1 1/4 metres) long, and 60 pounds (27 kg) to 120 pounds (55 kg) in weight.
Most caught, though, average 3 to 9 pounds (1 1/3 to 4 kg.)
They eat other fish, insects and crustaceans, and will even eat small mammals that enter the water.
Lake Trout are prized for both their flesh, and the fight they put up.
They have been introduced into Europe, South America and Asia.