Milwaukee County Zoo visitors who miss Chalupa — the giant Pacific octopus who was humanely euthanized at the beginning of ...

Visitors to a popular beach in Sydney's north shore have been warned to watch out for Blue-ringed octopuses after several bites were reported in the last week.

There may be around 10 different species of blue-ringed octopus, though only four have been given scientific names. The greater blue-ringed octopus (Hapalochlaena lunulata) is about 12 centimetres ...

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 ...

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.