The octopus, an incredible marine species known for its intellect, excellent camouflage abilities, and complex behaviours, has a distinct physiological trait: blue blood. This interesting ...

Finally, why do octopuses have blue blood? Are you still wondering why octopus blood is blue and what the three hearts do? Well, the blue blood is because the protein, haemocyanin, which carries ...

Imagine a creature that has three hearts….Surprised? Well, imagine that it also has nine brains and blue blood. Sounds like something from a sci-fi movie, right? But what if that’s actually true?

Octopuses are like aliens on Earth: three hearts, blue blood, and the ability to squeeze through a space the size of their eyeball; they can use tools, transform their bodies to mimic other ...

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 ...

They spend a lot of their time tucked away in crevices, hiding from animals that might try to eat them. There may be around 10 different species of blue-ringed octopus, though only four have been ...

What has bulbous eyes, seeking suckers, three hearts, blue-green blood, and more-than-the usual complement of limbs? Wait, ...

That's the reality for those unlucky enough to be bitten by a blue-ringed octopus. Initially its bite is painless. But quickly the fast-acting toxin goes to work, paralysing its target.