By cutting around the bones they can be removed. Fish make up the bulk of their diet but they will also take frogs, crayfish, waterdogs, ducks, birds, and mice. Northern pike have sharp teeth, so many anglers use a wire leader to prevent the line from being cut. Lake Trout have a raised tooth crest on the head of the vomer. The tail is forked.
Lake trout require cold, clear, well oxygenated water.
In summer they often move to depths of 50 to 100 feet, but in spring and fall you can find them at depths of 20 feet or less. They can also be taken by bottom-fishing with whole or cut fish.