1. Different body shapes. Salmon has a slender, submarine-like body, while salmon has a wide body and a large belly;

2. Fish scales are different. Salmon's scales are tiny and hard to see with the naked eye, while salmon's scales are larger;

3, different appearance. Salmon have a white striped edge on their abdominal fins, fins and the lower edge of their tails, which is very obvious and beautiful, while salmon do not;

4. The spawning period is different. In the natural environment, salmon spawn in the fall, while salmon fish are spawned in winter and spring.