The cutthroat trout is a species of freshwater fish native to North America. It is known for its distinctive red or orange slash marks under its jaw, which give it its name. These fish inhabit cold, clear streams, rivers, and lakes, primarily in the western United States and Canada. Cutthroat trout are popular among anglers due to their fighting ability and taste. They can vary in size, with some individuals reaching up to 30 inches in length. Their diet mainly consists of insects, small fish, and crustaceans, making them an important part of their aquatic ecosystems.