Blue-ringed octopuses carry a killer concoction called tetrodotoxin (TTX), a potent neurotoxin that can paralyze living ...

The TTX that a blue-ringed octopus injects is so deadly that 1 milligram of it can kill a human. It's one of the most potent toxins on earth, and there is no antidote.

The blue-ringed octopus appears grey or beige with light brown patches when it is at rest, but when agitated its 50 or 60 bright blue rings appear and pulsate with color, as a warning.

Cephalopods have colour-changing chromatophores on their skin, which allows them to camouflage themselves — but the blue-ringed octopus has a different trick up its tentacle.

Picture an octopus that could be deadly to humans. You’re probably thinking of a large creature, and not one that is the size of your palm. But indeed, that’s the blue-ringed octopus, one of several ...

But when it comes to blue-ringed octopus, this is a definite no-no. If you see one, look, don't touch — just admire it from a distance. And certainly don't try and eat a live octopus, like the ...

An Australian teenager had a lucky escape after being bitten by an extremely toxic blue-ringed octopus. A toddler also came close to touching the deadly cephalopod.

Blue-ringed octopuses are some of the most venomous creatures in the world, and contain enough venom to kill 26 adult humans within minutes. Their venom, which contains tetrodotoxin, is produced ...

For example, in 2006, a four-year-old boy in Australia survived two blue-ringed octopus bites because his mother identified the threat and sought care within 20 minutes of the bite.

There are four species of blue-ringed octopus and each one contains tetrodotoxin, which is one of the most deadly toxins in the world. (Image credit: Khaichuin Sim via Getty Images) ...

Don’t be fooled by its small size and dazzling blue rings this tiny octopus carries enough venom to kill 26 people in mere minutes. With no known antidote, the blue-ringed octopus is one of the ...

An unnamed woman was bitten twice by a blue-ringed octopus, which contains one of the most dangerous neurotoxins on the planet, but she escaped relatively unharmed. Skip to main content.