Deep-sea fish are often considered as a healthy food choice because they have many nutrients, such as protein, polyunsaturated fatty acids, vitamins and minerals. The following are some deep-sea fish with rich nutritional value:

1. Sardines are small fish with rich nutrients, such as vitamin D, calcium, protein and Omega-3 fatty acids. Sardines are cost-effective and inexpensive, and can be eaten by rinsing or baked.

2. Cod: It is a low-fat fish rich in Omega-3 fatty acids, with light taste and tender meat. Cod is rich in niacin and vitamin B6, which has a good effect on protecting cardiovascular system and preventing Alzheimer's disease.

3. Salmon: It is also a deep-sea fish rich in Omega-3 fatty acids. Salmon contains high-quality protein and various nutrients, including vitamin D and folic acid. It can be eaten fresh, boiled, roasted, etc.

4. Longli fish: also known as pike tail fish, is a kind of fish with high protein and high quality fat. It contains many nutrients, such as vitamin D, copper, selenium and zinc. Longli fish has tender meat and excellent taste, which is suitable for baking, steaming and other cooking methods.

generally speaking, deep-sea fish have high nutritional value and have many benefits when eaten in a reasonable amount. However, it should be noted that some deep-sea fish may contain harmful substances such as heavy metals and mercury, so it is necessary to choose reliable deep-sea fish, and in the case of moderate intake, rich nutrition from deep-sea fish can be obtained. In addition to deep-sea fish, other seafood is also one of the nutritious ingredients. The following are some common seafood products and their nutritional values:

1. Kelp: It is rich in iodine, vitamin C and other nutrients, and has the effects of appetizing, promoting digestion and moistening.

2. Porphyra: It is rich in nutrients such as protein, calcium, iron and vitamin B, which helps to promote metabolism and prevent anemia.

3. Oyster: It is rich in trace elements such as zinc and iron, which helps to enhance immunity and promote blood circulation.

4. Scallop: It is rich in nutrients such as protein, calcium and iron, which helps to lower cholesterol and keep the cardiovascular system healthy.

5. Sea urchin: It is rich in nutrients such as protein, fat and minerals, and contains a lot of vitamins such as riboflavin and folic acid, which helps to protect eyes and prevent anemia.

Generally speaking, seafood contains a variety of nutrients and has a good health care effect. However, the nutritional content of different seafood is different, and people are allergic to seafood, so when eating seafood, we need to know its characteristics and choose the seafood that we like and suit ourselves. At the same time, pay attention to the safety, hygiene and cooking methods of seafood, and eat it in moderation to achieve the dual effects of health and delicious. Seafood is indeed rich in nutrients, and it plays an irreplaceable role in human health and health care to mix and eat all kinds of seafood reasonably in the diet. The following are some common problems that should be paid attention to when eating seafood:

1. Pay attention to freshness when choosing seafood. Fresh seafood contains more nutrients in its meat. When buying seafood, you should see if it is fresh, bright in color and smelly.

2. Pay attention to whether seafood has allergic reaction. Some people may be allergic to seafood, including shrimp, crab and shellfish. If you feel unwell after eating seafood, you should seek medical advice promptly.

3. It is recommended to eat seafood at dinner. Seafood is a high-protein food, so eating it in dinner can help people get enough protein and promote their health.

4. Cooking methods should be diversified. Different seafood is suitable for different cooking methods, such as steaming, stewing and roasting.

5. eat in moderation. Seafood generally contains high protein, minerals and other nutrients, but also contains high cholesterol and high salt, so you should pay attention to the right amount when eating, and don't eat too much.

Generally speaking, seafood is a kind of food with high nutritional value. Before eating, we should pay attention to the freshness, whether it is allergic or not, and how to cook it. Eating seafood correctly can not only protect your health, but also enjoy the nourishment of delicious food. Seafood is a healthy and delicious food, but there are also some problems that need attention:

1. Seafood may contain some mercury. Some seafood, such as sharks, swordfish, tuna, etc., contain more mercury, which will lead to poisoning if ingested in excess. Therefore, we should pay attention to collocation and moderate consumption when eating seafood.

2. There may be microorganisms and parasites in seafood. Eating raw seafood, such as sushi, oysters and sea urchins, is likely to bring health risks. Therefore, it is best to avoid eating raw seafood, especially for the elderly and people with weak immunity, or buy heated seafood in reliable dining places.

3. Seafood is easy to deteriorate, producing bad smell and fishy smell. Some skills should also be followed when buying fresh seafood, preserving or placing it. For example, fresh seafood must be kept in the refrigerator to avoid direct sunlight or high temperature.

4. Allergens and harmful substances carried by seafood. Many people are allergic to shellfish, shrimp, crabs and other seafood, which may cause headache, diarrhea, dyspnea and other uncomfortable symptoms. Some seafood may be polluted by water environment or artificial breeding, and may also contain some harmful substances, such as industrial wastewater and heavy metals.

Generally speaking, correct eating methods, selection of high-quality seafood varieties, attention to freshness and heating sterilization can all be used to reduce the hygiene and health risks of eating seafood, and also let everyone enjoy the fun of delicious food.