1. The stinging sac of fresh jellyfish contains venom. Generally, the fresh jellyfish bought back must be processed and pickled by salt and alum for three times, and the toxin can be removed only after the water is filtered out. After jellyfish is processed, it should be soaked and rinsed repeatedly before eating to remove salt and alum. Soak the jellyfish in vinegar for more than 10 minutes after cleaning, because the Vibrio parahaemolyticus on the jellyfish surface is most sensitive to acid, which can kill the Vibrio parahaemolyticus attached to the jellyfish and make it safer to eat afterwards.

2. Fresh jellyfish contain serotonin, tetramine complex, peptides and other substances, which may cause histamine reactions such as allergies. At the same time, jellyfish belongs to seafood and contains certain parasites and bacteria. Vibrio parahaemolyticus adheres to its surface. If you eat fresh jellyfish directly, it may cause symptoms of food poisoning such as abdominal pain, diarrhea, nausea and vomiting and even shock. Eating fresh jellyfish directly by pregnant women may also lead to fetal malformation, which is not conducive to the healthy development of the fetus.