Today’s main character is small but deadly. It is the blue ringed octopus.
The blue-ringed octopuses live in tide pools in the Pacific Ocean, from Japan to Australia (mainly around southern New South Wales and South Australia ). Although they are only the size of a golf ball, they are one of the world’s most venomous marine animals. Each tiny octopus carries enough venom to kill 10 men, which is produced by bacteria living symbiotically in its salivary glands. Blue-ringed octopus venom has no known antidote, the only treatment is to provide life support/artificial respiration and mechanical ventilation until paralyzing effect wears off.
One interesting thing about the blue ringed octopus is it can turn on/off it’s rings. When it is at peace, it’s mainly blown/ yellow and looks rather dull (like the image above), but when it is provoked or at stress, its brown patches darken dramatically, and iridescent blue rings would appear all over the body.
It acts as a “don’t-touch-me-or-else” warning signal.
The following is a video of the creature by National Geographic:World’s Deadliest Animals:Australia