1. Oncorhynchus, also known as salmon, salmon and salmon, belongs to teleost, Salmoniformes and Salmon, mainly distributed in the waters bordering the Atlantic Ocean, the Pacific Ocean and the Arctic Ocean, and is a highly migratory fish with cold water, and is praised as the "Emperor of the Ice Sea" by the international food industry.

2. The yellowfin tuna is spindle-shaped. Slightly flat on the side, the tail is long and thin, the second dorsal fin and gluteal fin of the adult are prolonged, the ventral fin is in the chest position, the caudal fin is crescent-shaped, the caudal stalk is developed, and there are three bumps on each side. Jaws with small teeth, tapered, in a row. The body is covered with fine scales, and the scales in the chest are larger, forming a breastplate. The lateral line is obvious. Tuna is tender and delicious.

3. Cod belongs to Vertebrata, Subphylum Vertebrata, Division Teleostei and Gadiformes. Cod are mostly cold-water fish that live in the bottom of the ocean and the middle and lower layers of the deep sea, and are widely distributed in the oceans of the world. Among them, there are many world-class important economic fish with high economic value in the family Codidae and Haddock.

4. Cololabis saira, also known as bamboo saury, is named Pacific Saury because of its slender figure and the production season in autumn. The saury belongs to the genus saury, which belongs to the family sauridae. It is a close relative of flying fish and crane-stork family. It is a surface migratory fish, feeding on animal plankton, such as shrimp, podopod, fish eggs, copepods, etc., especially shrimp. Saury is delicious and nutritious. It is suitable for steaming, boiling, frying, baking and other cooking methods, and is deeply loved by consumers.

5. Hairtail belongs to trichiuridae, a suborder vertebrate of Chordata. Also known as nepotism, fat belt, oil belt, toothfish, etc., it is fierce. Qingdao and Rizhao cities along the Yellow Sea are called snakeheads. Hairtail's body shape is flat like a belt, silvery gray, dorsal fin and pectoral fin are light gray with tiny spots, tail is black, the tip of hairtail is big, and it gradually tapers to the tail, with a total length of about 1 meter. It is fierce and mainly feeds on shrimps and squid. It is mainly distributed in the western Pacific Ocean and Indian Ocean, and distributed in the Yellow Sea, East China Sea, Bohai Sea and South China Sea in China. It is also known as the four major seafood in China with large yellow croaker, small yellow croaker and squid.