Why not touch a blue-ringed octopus?

 A blue-ringed octopus.

More deadly than a snake

If you see a small octopus (arm spread of only three or four inches) with bluish patterns on its yellowish-brown body in the waters off coast of Australia and some pacific islands, DO NOT TOUCH IT.

It is probably a blue-ringed octopus and is more deadly than the most venomous snake.

A soldier who was exploring rock pools near Sydney found one and placed it on his arm.

He died ninety minutes after being bitten