👉 Salmon is a type of fish that belong to the family Salmonidae, commonly known as trout or cod. They are native to North America and are part of the freshwater eel family (Anguilliformes). Salmo is an ancient species with over 300 million years of evolutionary history, making it one of the oldest living fish. The name "salmon" comes from the Latin word "salmis," which means "water-dwelling."