Octopuses have nine brains, use tools, have the ability to recognize people and are so bright and brilliant it’d be cruel to ...

But their adorably small size and Instagrammable appearance is deceptive: blue-ringed octopuses are some of the ocean's most toxic animals. Blue-ringed octopuses are a group of highly venomous ...

That venom is now by definition a poison, because it is absorbed rather than injected through a wound,' explains Ronald. The blue-ringed octopus makes its own venom like other squids and octopuses.