They possess enough venom to fatally harm 26 humans within minutes.
They engage in combat with other octopuses to secure their territory and resources.
Their saliva contains two types of venom: one for hunting prey and another for defence.
Their life expectancy is only around 2 years.
There are at least 10 distinct species of blue-ringed octopuses.
Their beaks are strong enough to puncture through wetsuits.
These octopuses are easily recognised by their glowing blue rings.