The blue-ringed octopus is one of the most venomous animals in the world, rivaling box jellyfish in its toxicity. The toxin of a blue-ringed octopus can kill 26 adults within minutes, and there is currently no medical way to detoxify it. Fortunately, this kind of octopus generally does not attack people actively and will bite only when threatened. Morphological characteristics

The blue-ringed octopus is a very small octopus, only the size of a golf ball, and the span between its tentacles does not exceed 15 cm. This kind of octopus is usually yellow-brown in color, but they can also change their color according to different environments. Their bodies, including their tentacles, are covered with numerous bright blue rings. When they feel threatened, these rings will emit a dazzling blue light as a warning to each other. Living habits

Blue-ringed octopuses are mainly distributed in the Pacific Ocean between Japan and Australia. Due to their shy personality, they like to hide under rocks and only come out at night to move around and look for food. Their food is usually small fish, Crabs, shrimps and some crustaceans. As blue-ringed octopuses move through different environments, they may adopt the same protective coloration as the environment to hide themselves from predators. This type of octopus generally does not attack humans, but it will attack when provoked or in self-defense. Introduction to toxicity

Although the blue-ringed octopus is small in size, it is very poisonous. The toxin carried by one individual is enough to kill 26 adults at once within a few minutes. The toxin of the blue-ringed octopus is a neurotoxin. After a person is bitten by it, he will suffer from massive bleeding from the wound, fever all over the body, and difficulty breathing. If artificial respiration is not performed in time, the injured person will gradually suffocate. Currently, no effective antitoxin has been developed medically to prevent blue-ringed octopus toxins.