The Tiger Muskellunge, commonly called Tiger Muskie, is a carnivorous fish, and is the sterile hybrid offspring of the true Muskellunge and the Northern Pike. It is produced in hatcheries throughout North America and is commonly stocked as a biological control for unwanted fish species. Tiger Muskie, like Pike and Muskellunge, have long, cylindrical-shaped bodies. They have skinny and compressed heads and the bottom jaw is elongated with an upward curve, known as a duckbill-shape. Its pattern is varying amounts of color with vertical dark stripes and spots on a light background, the opposite color scheme of a Northern Pike.