The Blue-Ringed Octopus is very small, only the size of a golf ball, but its venom is powerful enough to kill a human. It carries enough poison to kill 26 adult humans within minutes, and there is no antidote. They are currently recognized as one of the world’s most venomous animals. Its painless bite may seem harmless, but the deadly nuerotoxins begin working immediatly resulting in muscular weakness, numbness, followed by a cessation and breathing and ultimately death. –They can be found in tide pools in the Pacific Ocean, from Japan to Australia. The Blue-Ringed Octopus, affectionately called the BRO, are a highly sought after underwater photography subject, topping the holy grail critter list for many underwater photographers and naturalists. There are approximately 5-10 different types of species found. They were originally discovered inhabiting the western coast of Australia, and they are the only lethal octopus known to man.
The Lesser Blue ringed octopus, Hapalochlaena maculosa (found only in Australia), and Greater Blue Ringed Octopus, Hapalochleana lunulata, are the most common. The species are divided and named not by the size of the animal but by the amount of rings.
They possess eight arms with dual rows of suction cups, a large head and two big eyes.
I give the blue ringed octopus a rating of 90/100 because it is extremely deadly.