Video: Divers Catch Vibrant but Deadly ‘Blue-Ringed’ Octopus on Film Off Australian Coast

Video: Divers Catch Vibrant but Deadly ‘Blue-Ringed’ Octopus on Film Off Australian Coast
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The southern blue-ringed octopus is mesmerizing in its beauty.

Don’t get too attached, though. The venom in the cephalopod is strong enough to cause respiratory failure in a human with just one bite—and this is an octopus that isn’t afraid to lash out if it feels threatened.