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 ...

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

The octopus uses the neurotoxin tetrodotoxin (TTX), one of the deadliest toxins on Earth. The neurotoxin prevents communication signals from travelling between nerve endings and muscles by blocking ...

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 ...

In June 2024 and for years, rumors have spread that a very small, beautiful octopus covered in blue rings has enough venom to kill 26 adults within minutes: The neurotoxin causes progressive paralysis ...