The reason why jellyfish sting is its instinctive sense of self-protection.
Jellyfish is a kind of zooplankton, belongs to a kind of jellyfish, the body contains a lot of water, is the most water-containing animals, in the east coast of our country and the southern coastal areas have a wide distribution, especially in the east of fujian, there is a "april 8, a feed rain, a Portuguese jellyfish" said. Jellyfish is also a good ingredient, we often eat jellyfish skin, old vinegar jellyfish head are flavorful jellyfish. It is due to human predation on jellyfish in large quantities, jellyfish from the instinctive need for self-defense, so they will sting people.
Old Vinegar Jellyfish
That jellyfish is soft and squishy, so how does it sting? It turns out that although jellyfish look like parachutes, they also have tentacles which are their weapons. Jellyfish tentacles have a lot of stinging cells, these stinging cells in addition to ordinary animal cells have a nucleus and cytoplasmic cell membrane, there is also a structure inside the cell called the capsule of the stinging silk, the capsule of the stinging silk, as the name suggests, there are a lot of stinging silk. There are also needles on the outside of the stinging cells. When a jellyfish encounters an attack and touches its needles, the needles in the capsule will fire out and sting the attacker while releasing some toxic and corrosive liquid. Due to the size of human beings compared to jellyfish and other marine life, the toxic liquid released by the jellyfish is not fatal to us, at most, we feel a little numb, but if the real sea creatures touch the jellyfish, they may not be so lucky, and generally is the result of the loss of life. There are also some jellyfish that are so toxic that even a human touching them may kill them, such as the monkfish (also known as the Portuguese battleship jellyfish).
Monk Jellyfish aka Portuguese Battleship Jellyfish