Seafood, also known as seafood, refers to the use of marine animals to make dishes, including fish, shrimp, shellfish and so on. Although seaweed and other marine organisms are often cooked into food, seafood is mainly made for animal cuisine.

Narrowly, only fresh seafood can be called seafood, and seafood is categorized as live seafood and frozen seafood.

Two, seafood purchase method

1, crab:

Select live crabs should be picked up first to weigh, dancing claws powerful is good. Pick sea crab, where the back of the shell is black-green, with bright crab, are meat thick and strong; back of the shell is yellow crab, most of the thinner. In addition, you should also pick the chelip force, umbilical cord full, white abdomen, deep and thick lines, if you come across the abdomen yellow, shallow and thin lines, the weight of light crab, on behalf of its not strong enough. Good quality fresh fish: eyes bright and transparent, eyeballs protruding, gill cover tightly closed, gill flakes pink or red, no mucus and dirt, no odor, fish scales bright, neat, fish body is quite straight, the belly is full, not swollen, the meat is solid and elastic, finger pressure depression immediately recovered; anus concave.

2, shrimp

Good quality shrimp: head, body closely linked, shell and shrimp meat tightly into one, with the hands of the shrimp body feel hard and elastic, shrimp body on both sides and the ventral surface of the white, the back of the blue (male shrimp yellowish), glossy.

Second-grade shrimp: head, body connection slack, shell, meat separation, shrimp body soft and lose elasticity, body color yellow (male shrimp dark yellow) and loss of luster, shrimp body between the joints appear black hoop, but still edible.

Seriously poor quality shrimp: head off, body soft as mud, shell off, body color black purple, the nutritional value of such shrimp declined more, if it is stored for a long time in an unclean environment, may be infected with pathogenic bacteria and other microorganisms, should not be eaten again.

3, squid:

The body shape is complete and solid, pink color is good.

4, fresh fish:

Eyeballs full, meat solid and elastic, gill color bright red, scales intact for fresh.

5, jellyfish skin:

complete without holes, the surface of the moist and shiny, bite the sound is good.

6, shellfish

In order to reduce the eating shellfish seafood caused by things poisoning, it is best to buy fresh shellfish, shopping for the first time to see, fresh shellfish shell color should be glossy, limbs hard and elastic, in addition to see the storage of shellfish water is clear, whether or not there is fecal matter. Secondly, you can touch it with your hand, it will contract a little can be selected live, will move the fresh seafood. Finally, but also with the nose to smell, if the general seafood unique fresh flavor, said fresh, on the contrary, if there is a fishy smell and the smell of corruption should be avoided to buy.

Three, medicinal value

Seafood is conducive to lowering blood lipids too much to eat may make the body cholesterol. Scientists have found that Eskimos are less likely to suffer from cardiovascular disease, which is related to their main food from the deep sea fish. These fish are rich in polyvalent unsaturated fatty acids, which can lower triglycerides and LDL cholesterol and reduce cardiovascular disease. Although shrimp, crab, sardines and clams contain more cholesterol, however, because of their lower content of saturated fatty acids, and, shrimp and crab seafood, most of the cholesterol is concentrated in the head and the yolk, as long as the consumption of these two parts of the removal, you will not consume too much cholesterol.

Sea cucumber has the effects of aphrodisiac, beneficial to gas, intestinal moistening and drying, stopping bleeding and anti-inflammatory, etc. Regular consumption is quite beneficial to the urination caused by kidney deficiency and hypogonadism. The therapeutic methods of sea cucumber include sea cucumber porridge and sea cucumber chicken soup.

Eel can replenish deficiency and strengthen yang, remove rheumatism, strengthen muscles and bones, and regulate blood sugar. It is also effective in regulating hypogonadism, diabetes, impotence, rheumatism, soft tendons and bones.

Sea Snake can tonify the kidney and strengthen the yang, treating impotence of kidney deficiency, and has the efficacy of dispelling wind and promoting blood circulation, and nourishing the skin.

The iodine content of seaweed food is the crown of food. Iodine deficiency will not only cause defects or deformities in the nervous system, auditory organs, thyroid development, but also lead to sexual dysfunction, decreased libido. Therefore, middle-aged people should often eat some seaweed food, such as kelp, wakame and so on.

Tuna contains a lot of myoglobin and cytochromes and other pigment proteins, most of its fatty acids are unsaturated fatty acids, with lower blood pressure, cholesterol, and the prevention and treatment of cardiovascular disease and other functions. In addition, tuna can also tonify the deficiency of Yang, remove rheumatism, strong bones, regulate blood sugar and so on.

The nutritional value of squid is very high, it is rich in protein, calcium, taurine, phosphorus, vitamin B1 and other nutrients needed by the human body, and the content is very high. In addition, the fat content is extremely low. Cholesterol content is high. Every 100 grams of fresh meat of gun squid contains about 15 grams of protein, and the content of vitamin A is 230 international units, which is about twice as much as that of squid. Dried squid is a lightly dried product of Chinese gun squid.

Shrimp has the function of tonifying the kidney and strengthening the yang, especially freshwater live shrimp has the strongest yang and essence.

The scallop has the function of strengthening the yang and essence, tonifying the five organs, and has the function of regulating the deficiency of qi and blood, lack of food, dry skin, impotence, and so on.

Scallop (fresh shellfish) is very high in nutrients, containing protein, calcium phosphate and vitamin A, vitamin B, vitamin D and so on.

The body of scallop is rich in protein and fatty acids, and according to analysis, scallop contains unsaturated fatty acids such as eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) which are indispensable to the human body, and EPA and DHA inhibit the effects of hypertension, myocardial infarction and arteriosclerosis.

Salmon is rich in unsaturated fatty acids, can effectively reduce blood lipids and blood cholesterol, prevention and treatment of cardiovascular disease, two meals a week, it will be able to reduce the probability of death by heart attack by one-third. Salmon also contains a substance called astaxanthin, a very powerful antioxidant. Omega-3 fatty acids it contains is the brain, retina and nervous system essential substances, have enhanced brain function, prevent Alzheimer's disease and prevention of vision loss effect;

Abalone is extremely rich in nutritional value, containing twenty kinds of amino acids, each hundred grams of fresh abalone meat rich in protein 23.4 grams, 3.4 grams of fat, inorganic salts calcium 32 milligrams, 3.0 milligrams of iron, there are also considerable Iodine, zinc, phosphorus and vitamins A, D, B1 and so on. The nutritional value of natural wild and original abalone is better than that of dried abalone. The method of making dried abalone and the cooking method will surely lose a lot of valuable elements and lose the original flavor and function. Sea snails and clams. Rich in vitamin A and zinc. Protein content is higher than lamb. These seafoods are high in zinc, which is also good for skin and hair health. Vitamin A helps improve vision.

Frail people are advised to cook porridge with scallop often, it is very delicious. Natural flavor, no need to add seasoning, but also rich in nutrition, after the disease of mental instability, poor appetite is the most appropriate. Scallop is beneficial to the five organs, and nourish the kidney yin for its specialty. Insufficient kidney yin in this case, there is often dizziness, cheeks baking heat, dry mouth and throat, deafness and tinnitus, lumbar and leg weakness, spermatorrhea and night sweating, heartburn, insomnia, urination, low fever in the afternoon, the tongue is dry and red or light peeling mossless, pulse is thin and countless. Neurasthenia, diabetes, neurological deafness and tuberculosis and other chronic wasting diseases are common kidney Yin deficiency.