Brightly Coloured Blue-Ringed Octopus is One of the Ocean’s Deadliest

Friday, 2 March

This mesmerisingly vivid octopus is more than just a flashy show—it's also one of the most venomous creatures of the sea. Blue-ringed octopuses, named for the iridescent blue rings that flash across their bodies when they're agitated or threatened are capable of gravely injuring and even killing humans with just one bite.

Their saliva contains a powerful nerve toxin that causes respiratory failure. But don't fear; like most animals, they only attack when they feel their lives are in danger.