The blue-ringed octopus is the only octopus to have a lethal toxin that can kill humans. Read here to learn about potential treatments.

Forbes contributors publish independent expert analyses and insights. I write about biodiversity and the hidden quirks of the natural world. Go diving into the intertidal waters of the Great Barrier ...

Add Yahoo as a preferred source to see more of our stories on Google. Full paralysis and respiratory failure can occur after a bite. There is no antivenom; ventilator support is one of the best ...