Blue-ringed octopus are famed for being one of the most venomous animals on the planet, and the symptoms from a bite are the stuff of nightmares. But how worried do you need to be?

Oceans are home to some of the most fascinating and mysterious creatures that have survived on our planet for millions of ...

Take this as a sign to stay away. The warning system of the blue-ringed octopus doesn’t seem to work on a lot of people, since many have taken too close a look, and been horribly bitten by its ...