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 characterized by their streamlined bodies, forked tails, and a range of colors that can change depending on their habitat and life stage. These fish are important both ecologically and economically. They play a crucial role in aquatic ecosystems as both predators and prey. Additionally, salmonids are popular among anglers and are often farmed for food, making them significant in the fishing industry.