Salmon is an anadromous fish, which is distributed in the northern Pacific Ocean and the Arctic Ocean. There are six main species: salmon, humpback salmon, red salmon, large-scale salmon, Mengsu salmon and silver salmon. Among these species, except for the salmon of Monsu, which is only produced on the coast of Asia, the others are distributed on the coast of America and the coast of Asia. However, in terms of catch, humpback salmon occupies the first place in both the coast of Asia and the coast of America.