The toxin in saliva paralyzes prey while the blue-ringed octopus eats it. TTX injected by a blue-ringed octopus is so deadly that 1 milligram can kill a human. It is one of the most potent toxins on Earth and has no antidote. Octopuses have sharp beaks and can produce poisonous stings.
Even if you only know that the genus of blue-ringed octopus (Hapalochlaena) is poisonous, all octopuses have venom, although most are not lethal to humans. The bite of the Pacific Giant Octopus will not only hurt, but it will also inject poison into its target (although this poison is not deadly). There are not many reports that octopus injure humans; they tend to avoid humans and many attacks have not been verified. Octopuses aren't really designed to excel in arm wrestling, but at a certain size they're capable of dominating us.
Octopuses are generally considered to be the cute, colorful, and (incredibly) intellectual characters of the ocean. Octopus bites can cause bleeding and swelling in people, but blue-ringed octopus venom (Hapalochlaena lunulata) is only known to be deadly to humans. When the octopus crawled out after the dive, the diver picked it up with her bare hands to return it to the water. While it was undoubtedly an unpleasant experience, it is likely that the baby octopus acted out of fear, feeling threatened after being pulled out of the water and placed near the woman's mouth.
Made of hard chitin (just like the material of crab exoskeletons, for example), this octopus beak actually looks a lot like that of a parrot, as you can see in this image of a giant squid's beak below. The divers did not notice that a giant juvenile Pacific octopus (Enteroctopus dofleini) had settled in the shell. Apparently he was going to eat it for dinner, but before that, he decided it was a good time for a photo opportunity and — we're saying this again — he placed the octopus on his face. Although blue-ringed octopus stings are known to be life-threatening, bites from most octopus species are generally not problematic.
With three hearts, nine brains and eight arms, octopuses seem equipped to tackle almost any task they decide on. Once again, the octopus was not directly attacking the diver, but seemed to frown at the invasion of his personal space. The octopus, probably not impressed by being on someone's face, took a couple of painful bites and injected a little poison into the wound. Even so, despite losing these advantages, an octopus is still able to defeat a human in an arm fight, depending on the confrontation.
