1, the shrimp line on the back of shrimp is the waste that the shrimp has not excreted. If it tastes muddy in the mouth, it will affect the appetite, so it should be removed.

2, the color is red, the body is soft, and the shrimp that turns around is not fresh. Try not to buy it. Rotten shrimp must not be eaten.

3. When shrimp is eaten with some fruits at the same time, it should be noted that shrimp is rich in nutrients such as protein and calcium. If it is eaten with fruits containing tannic acid such as persimmon, hawthorn, pomegranate and grape, it will not only reduce the nutritional value of protein, but also stimulate the gastrointestinal tract after tannic acid and calcium combine to form calcium tannic acid, causing discomfort, vomiting, dizziness, diarrhea and abdominal pain. Seafood should be eaten with the above fruits at least 2 hours apart.

4. It is best not to drink a lot of beer when eating seafood, because it will produce too much uric acid and cause gout. When eating seafood, it should be accompanied by dry white wine, because the fruit acid in it has the function of sterilization and deodorization.

5. The blue-black back of shrimp is a fresh performance. Generally, shrimp with hard shell, complete head, tough, curved body and big head tastes delicious.

6, allergic to eating shrimp and suffering from allergic diseases, such as allergic rhinitis, allergic dermatitis, asthma, should be careful.

7. When preserving small dried shrimps, in order to prevent the shrimps from drying and oxidation, try to put the shrimps into plastic loans or sealed containers for refrigeration and preservation.

Two: the skills of eating crabs:

The correct way to eat is to remove the round cover of the crab. If it is a female, you will see the crab yellow in Huang Chengcheng-it is the most delicious thing on the crab. You will also see something white like brush hair near your thighs on both sides, which is not edible. After eating crab roe, you can eat crab meat. Crab meat is white like fish. It's best to break the crab in half, so as to expose the glistening crab meat.

Most people finally eat crab legs, because eating crab legs takes time and there is not much meat in them. But people still try to finish their legs. Some people think the meat in their legs is delicious, while others don't want to waste it. You have to find a way to get the meat out of the crab legs. You can crush the hard shell of the legs with a special clip for eating crabs, or you can get the crab meat out with a toothpick or fork. Because the crab shell is hard and the crab legs are sharp, it is easy to bite the teeth.