湖鱒, also known as lake trout, is a species of freshwater fish found primarily in North America. They inhabit cold, deep lakes and are known for their distinctive spotted skin, which can vary in color from green to gray. Lake trout are popular among anglers due to their size and the challenge they present when fishing. This fish is an important part of the ecosystem, serving as both predator and prey. They primarily feed on smaller fish, such as smelt and whitefish, and can grow quite large, sometimes exceeding 30 inches in length. Lake trout are also known for their long lifespan, often living for several decades.