The brook trout, scientifically known as Salvelinus fontinalis, is a freshwater fish native to North America. It is commonly found in cold, clear streams and lakes, particularly in the northeastern United States and Canada. Brook trout are known for their vibrant colors, featuring a dark green or blue back with lighter spots and a distinctive marbled pattern on their sides. These fish thrive in well-oxygenated waters and are often considered an indicator of a healthy aquatic ecosystem. Brook trout can grow up to 12 to 20 inches in length, although some individuals may reach larger sizes. They are popular among anglers and are often sought after for their delicious taste.