The venom can kill more than 20 humans in just a few minutes, though this is extremely unlikely to happen. Blue-ringed octopi won’t bite unless they feel provoked. Blue-ringed octopi have venom called tetrodotoxin, or TTX. This is one of the most serious and deadly types of venom found in the ocean. The octopi’s salivary glands produce the venom, and the bacteria gets dispersed through their beak. TTX can paralyze a human in minutes. Due to this paralysis, your body wouldn’t be able to get enough oxygen, and death from a blue-ringed octopus would occur. Read more on Healthline