BlueThe venom secreted by the blue-ringed octopus contains substances such as tetrodotoxin, serotonin, and acetylcholine. This substance is strongly neurotoxic and blocks the transmission of nerve impulses. One of these is tetrodotoxin, a potent poison that can paralyze the nerves, which not only paralyzes its prey quickly, but also poses a great threat to humans, and is so toxic that as little as 0.5 milligrams can kill an adult.

When these toxins reach the prey or the human body, they will spread rapidly, paralyzing the central nervous system and nerve endings, making the person appear delirious, unable to breathe on their own and other symptoms, and finally die of respiratory failure. In addition to paralyzing the nervous system and suffocating a person, the venom of the blue-ringed octopus also prevents blood from clotting, causing wounds to bleed profusely and ultimately threatening a person's life.

The blue-ringed octopus, though a master of using poison, is not a master of making it; the venom, though present in its salivary glands, is not secreted by itself, but is caused by virus particles in the salivary glands.

Life habits of the blue-ringed octopus:

The blue-ringed octopus is shy and likes to hide under the rocks, and only comes out at night to move around and forage for food. If it encounters danger, it will emit a dazzling blue light to warn the other party. Blue ring octopus is a very small octopus species, arm spanning no more than 15 centimeters. The blue-ringed octopus mainly inhabits the Pacific Ocean waters between Japan and Australia.

The toxicity of the blue-ringed octopus can be shown by its own color. Its skin contains color cells that can change color at will, and by contracting or stretching and changing the size of the different color cells, the blue-ringed octopus's entire appearance changes. So when the blue-ringed octopus moves through different environments, it can use the same protective color as the environment's color.

If it is threatened, the blue rings on their bodies flash, giving the blue-ringed octopus its name. The cells in these blue rings are densely packed with brilliant, colorful crystals formed by reflected light. The blue-ringed octopus uses these unique rings to warn other creatures that it has a deadly weapon.