Techincally speaking, octopi do not sting - they bite. And the one you would be thinking of is the small Blue-Ringed Octopus, found from Japan to New Zealand (but they are most commonly found in coastal regions of Southern Australia).
Point of interest - all octopi have a venomous bite, but only the Blue-Ringed octopi's bite is fatal to humans.
The most poisonous octopus in the world is called the blue-ringed octopus. It is known to be very deadly to humans. Its blue and black rings warn other animals to stay away from it. It lives in tide pools in the Pacific Ocean, from Japan to Australia (mainly around Southern New South Wales and South Australia).
The Blue-ringed octopus is the most deadly octopus and lives in Australia.
The Humboldt Squid (Dosidicus gigas) is regarded as the most aggressive, known squid species.
The Blue Ringed Octopus. Found in the waters off the east coast of Australia.
The tiny Blue-ringed octopus
The biggest squid in the world is the colossal squid.
Dangerous Encounters - 2005 Cannibal Squid was released on: USA: 30 July 2010
The most dangerous war in the world is the Vietnam War.
the great white shark is the most dangerous shark in the world
The World's Most Dangerous Party was created in 1993.
The ISBN of The World's Most Dangerous Places is 0060011602.
The World's Most Dangerous Ideas was created in 2004.
they are found on most beaches around the world
It is not the most dangerous region.
USA by far is the most dangerous country in the world.
The duration of The World's Most Dangerous Magic is 3600.0 seconds.
The World's Most Dangerous Places has 1088 pages.