The distinction and selection of live marine fish is 1, and the ones that can be bought live are Duobao, Red Perch, Pomfret, Baogong, Lycopodium and Grouper. These are farmed fish. The feed of pomfret is artificial granules, and it is unknown whether the ingredients of granules contain toxic substances, but the mortality rate of cultured pomfret is high. Others are mainly dead fish, dead shrimp and dead crabs. When you get fish disease, antibiotics will be added. The meat is thick. Personally, I think it's not good to eat too much. You can also buy live Shijiu Palace, which is also a good wild marine fish. It's not big, but it tastes good. Buying the brightly colored Shijiu Palace also means good water quality. Please don't choose black 19 male, the water quality is not good, and the heavy metal content is definitely not low. For example, in Shekou area, in the seaside vegetable market, you can also buy live plums, such as black plums, yellow-horned plums, peppers, wild stone nails, wild sesame spots, mud dragons and so on. Vertical fish are generally wild, but a few are farmed. Wild black vertical tail is light blue, yellow foot is white, front crucian carp and tail are yellow, and red vertical body is light red with stars. These are the best marine fish. Wild stone nails and mussels are bright red, black or yellowish. Mud sprout is generally wild and tastes good. Mud sprout with good water quality is very close to the color of seaweed, and its body is flat and long. The choice of fierce chilled marine fish is 1. There are many chilled marine fish for sale in seafood markets or supermarkets, including wild and cultured marine fish. Wild, such as yellow croaker (wild lips are yellow, and the scales on the body are yellow, especially the stomach. Educated lips are white, yellow is not so bright, and the body is not so long and fat. The stomach is not clean), sequoia, peeled fish, slippery fish (white flowers, slightly worse in taste than yellow flowers, but similar in appearance, white in body, and light yellow in crucian carp, which are the main fish in coastal areas of Guangdong), oil pears, Sha Jian (Sardinia), pond fish, horse horn, big eel, and Huang Lizhu (yellow from the bottom to the whole tail, with yellow body fluids flowing out), please pay attention when selecting. Frozen marine fish are also cultivated, such as yellow pomfret (white body, slightly yellow crucian carp), red ancient perch (star perch) and yellow aconite (salt and fresh water culture). The salty and fresh water around us is concentrated in the manhole area in the west. The water pollution is too severe and the time for dead fish is limited. The above words are only a small part of temporary memory. Please point out and forgive the shortcomings, and hope to understand the opinions of the predecessors. Marine fish involves a lot of knowledge, and I sincerely hope I can help you.