Salmonids are a family of fish known as Salmonidae, which includes species like salmon, trout, and char. They are primarily found in cold freshwater and coastal marine environments. Salmonids are recognized for their streamlined bodies, which help them swim efficiently, and many species are known for their migratory behavior, traveling long distances between freshwater spawning grounds and ocean habitats. These fish are important both ecologically and economically. They serve as a food source for various predators, including birds and mammals, and are popular among anglers. Salmonids also play a crucial role in nutrient cycling within their ecosystems, especially when they spawn and die, enriching the surrounding environment.