This unassuming octopus pairs bacterial chemistry with evolutionary efficiency to deliver one of the most powerful defenses in all of the ocean.

Add Yahoo as a preferred source to see more of our stories on Google. A teenager in Australia nearly died from a poison octopus' bite after he pocketed a seaside souvenir. 18-year-old Jacob Ettington ...

An Australian teen nearly died when he was bitten by a poisonous blue-ringed octopus hiding in a shell he scooped out of the ocean to show his niece. Jacob Eggington, 18, was swimming and looking for ...

Octopuses have gotten a reputation for being cunning camouflagers and intelligent creatures. But some are known for a more ominous reason: They're deadly. One group — the blue-ringed octopus (genus ...

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 ...