The fish is spindle-shaped and slightly flat. The dorsal fin has 29 to 30 hard and soft fins. The anal fins have 1 and 22 fin ray spines. The upper part of the gong has 鳃耙8～12 and the lower part 17～23. Side scales 210 to 220. The back is dark blue and the belly is silvery white. There is a yellow longitudinal band on the body side. The larvae with a body length of 30-80 mm are yellow-brown with metallic luster, and 6-11 lateral bands with reddish-brown body. The fish is a warm water fish distributed in the Sea of ​​Japan and the sea areas south of Taiwan. The fish swims from south to north from spring to summer, and from north to south from autumn to winter. The spawning period is from February to March in the East Sea area, and from March to May in the sea areas around Japan's Kyushu and Shikoku Islands. Egg buoyancy, diameter 1.15 ~ 1.44 mm, newly hatched larvae full-length 3.5 mm, a large number of water temperature in the 19 ~ 21 °C and chlorination of 1.91% ~ 1.93% of the waters. Larvae generally drift northward with the Kuroshio Current and its tributaries, and are concentrated in the ocean front, often attached to drifting algae. When the fish grows to 15 centimeters, they leave the drifting seaweed and swim freely. Fish less than 4 cm in length mainly feed on copepods and crustaceans such as Zergling, and as they grow, they begin to feed on fish juveniles and other small fish. As long as 15 centimeters long, sardines, clams, squid, etc. are used as food. The longevity of the fish is 7 years old, the largest individual is 96 cm and the body weight is 13 kg. Artificial reproduction technology has been solved. The origin of fish cage culture originated in Japan. In recent years, fish farming has been carried out successively on the coasts of several provinces in Guangdong, Fujian and Zhejiang. The breeding period is 2 years. In May, the seedlings will be placed in cages. The breeding density is 20 kg per square foot of water. Fish is appropriate. With growth, the mesh of the net clothes must be increased, in order of 1, 1.5, 1.7, 2.5, 4.3 and 6.O centimeters. The fish lived within the temperature range of 7-28°C, and the optimum water temperature for growth was 24-26°C. When the density of seawater falls from 1.025 to 1.015 due to heavy rain, growth will be affected. Feed the bait once a day. To prevent excessive feeding, bait can be stopped every week for 1 to 2 days. With growth, the amount of feed needed per kilogram of body weight also decreases. In the first year of breeding, the amount of feed to be fed in summer is greater and less in winter. In the second year of breeding, the amount of food fed to the summer rose to 8% of the fish's weight, and in winter it dropped to 3% to 4% of its weight. Jade fish, fish, sardines, mackerel and saury can be used as feed for fish. The feed must be fresh. Otherwise, the food will spoil and the fat will be oxidized. After the fish eats, it will cause physiological abnormalities. Feeded bait fish must be stored below -20°C. Before the frozen fish are fed, they must be thawed. The small-sized bait fish can be fed whole, and the large-size baitfish can be cut or chopped and re-cast. Feed coefficient of 8 or so. The main diseases are nocardiac disease, pseudotuberculosis, and streptococcal diseases.
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