Fresh jellyfish contains a lot of water, thick skin and toxins, so it is inedible. It needs to be marinated with edible salt and alum (commonly known as alum) for three times, so that fresh jellyfish can be dehydrated for three times and toxins can be discharged with water.

The stinging sac of fresh jellyfish contains venom, which is composed of various polypeptide substances. Jellyfish toxin is 450 times more toxic than tetrodotoxin. Jellyfish protect themselves by stinging silk sacs on tentacles. The tentacles will be entangled when they meet people, and at the same time, the barbed wire will pop out of the capsule and stab into the human body, releasing peptide toxins. This is the way jellyfish protect themselves.

When people break the antenna, it still sticks to the wound and continues to be poisoned. Whether jellyfish are alive or dead, or even broken into pieces and washed on the beach, their tentacles may sting people.

Extended data:

Artificial jellyfish is close to natural jellyfish in taste and chewiness. What is the best way to tell the truth from the false? Yuki, the head of Kachen, teaches secret skills.

Natural jellyfish is a kind of marine rhizome plant, which is pickled with alum after being caught. Its appearance is milky white, flesh yellow, light yellow, the surface is moist and shiny, it is not easy to break when pulling, it is tough when biting, its shape is natural and round, and there is no broken edge. The color of artificial jellyfish is light yellow or milky white, and jellyfish silk looks bigger and whiter, with crisp meat and crisp and loud taste.

Some of them are crisp but lack toughness, and they are easy to break when pulled up. The taste is rough like chewing powder skin with a little astringency, which belongs to the inferior products of artificial jellyfish. If it is purple-black, it has foul jellyfish silk and pus-like liquid, which means it has deteriorated. The obvious way to distinguish is to look at the price.

The cost of artificial jellyfish is about 1 yuan/kg, and the retail price is much lower than that of natural jellyfish. The laziest way is to buy pre-packaged jellyfish with Qs logo processed by regular enterprises in supermarkets in regular channels, which can effectively reduce the chance of buying artificial jellyfish.

Baidu encyclopedia-jellyfish

People's Daily Online-A 4-year-old girl picked up a jellyfish out of curiosity and was stung and died unfortunately.

People's Network-Jellyfish is popular in early summer. Can artificial jellyfish harm human body?