The difference between tuna and salmon is the difference between family, origin and form, and tuna is more expensive.

A, family difference

1, tuna: tuna: tuna for the animal kingdom, chordata, vertebrate subclass, bony fishes, perch, tuna suborder, tuna, tuna, tuna, tuna, tuna, tuna, tuna, a large ocean-going important commodity edible fish.

2, salmon: salmon for the animal kingdom, chordata, vertebrates, vertebrates subclass, spoke fin fish, neofin subclass, salmoniform order, salmonidae, salmon and trout anadromous fish.

Second, the difference in origin

1, tuna: tuna is distributed in the Indian Ocean, the Pacific Ocean, the middle of the Pacific Ocean and the middle of the Atlantic Ocean, etc., the main species of skipjack tuna, bluefin tuna, marsupial tuna, albacore tuna, yellowfin tuna, bigeye tuna and so on.

2, salmon: salmon is mainly distributed in the north of the Pacific Ocean and Europe, Asia, the Americas, the northern region, the main types of Norwegian salmon, Finnish salmon, U.S. salmon, salmon and so on.

Three, morphological differences

1, tuna: tuna's body shape is longer, stout and rounded, streamlined, backward acuminate and tail base elongated, caudal fin is forked or crescent-shaped, the caudal peduncle on both sides of the ridges are obvious, the dorsal and anal fins each have a line of fins at the back, has a torpedo shape, and its cross-section is slightly rounded.

2, salmon: salmon's body shape is laterally compressed, dorsal bulge, sharp teeth, scales are fine, silver gray, spawning with orange stripes, the meat is compact and fresh, the meat color is pink and has elasticity, the scales are small and spiny.