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 ...

The tiny but deadly blue ringed octopus can paralyze and kill humans in minutes, with no known antidote.

Underwater metal detecting often looks calm, controlled, and safe. But hidden among rocks and shells are some of the most venomous creatures on the planet, including the blue-ringed octopus. In one ...