Jellyfish can be divided into two types: jellyfish head and jellyfish skin, but they are all processed and brewed from marine jellyfish. Jellyfish skin is made of jellyfish umbrella cover, which is characterized by large, thin and white skin without black film. Jellyfish head refers to the tentacles of jellyfish with thick meat. Jellyfish head is a fine product in jellyfish, which has high taste and nutritional value. Nutritional analysis 1. Jellyfish is an important nutritious food, which contains many nutrients needed by human body, especially iodine lacking in people's diet. 2, containing substances similar to acetylcholine, which can dilate blood vessels and lower blood pressure; 3. Mannan gum has a certain effect on preventing and treating atherosclerosis; 4. Jellyfish can soften hard mass, clear away heat and resolve phlegm, which is beneficial to tracheitis, asthma, gastric ulcer, rheumatoid arthritis and other diseases and has the effect of preventing and treating tumors; Hairdressing, textile, grain processing and other workers who have more contact with dust often eat jellyfish, which can remove dust and clear the stomach and ensure good health. Suitable for the general population to eat 1, suitable for middle-aged and elderly people with acute and chronic bronchitis, cough and asthma and yellow and thick phlegm; Suitable for people with hypertension, dizziness, hot thirst and constipation; Suitable for patients with simple goiter; Suitable for people who are thirsty after drunkenness; 2, people with spleen and stomach deficiency should be careful to eat. Jellyfish should not be preserved with sugar, otherwise it cannot be preserved for a long time. Cooking guide 1, when eating cold jellyfish, put some vinegar properly, otherwise it will make jellyfish "stale"; 2. Those with peculiar smell are rotten and inedible; Fresh jellyfish should not be eaten, because fresh jellyfish contain much water, thick skin and contain toxins. Only by pickling with edible salt and alum (commonly known as alum) for three times and dehydrating fresh jellyfish for three times can the toxin be discharged with water; 3, jellyfish with fungus, moistening intestines, whitening, lowering blood pressure, long-term consumption, good for health; 4, jellyfish must be washed with water before eating, to salt, alum, blood, sediment, and then simmered in hot water, and then shredded and mixed with cold dishes; 5. When the jellyfish is drowning, the water temperature should not be too high, and it can be 50% to 60% hot. Dietotherapy is salty and flat, and enters the liver and kidney meridians; Has the effects of clearing away heat and resolving phlegm, resolving food stagnation, moistening intestine and relaxing bowels; Can be used for treating lung dryness due to yin deficiency, hypertension, phlegm-heat cough, asthma, lymphoid tuberculosis, dyspepsia, constipation, etc.