Rainbow trout are a species of freshwater fish known for their vibrant colors and distinctive markings. They typically have a silvery body with a pink stripe running along each side, and their skin is often dotted with black spots. These fish are native to North America but have been introduced to many other regions around the world. Rainbow trout thrive in cold, clear streams and lakes, where they feed on insects, small fish, and crustaceans. They are popular among anglers due to their fighting ability and are often raised in fish farms for both sport and food.