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 ...

Quick Take The blue-ringed octopus has extremely potent venom, capable of killing a human victim. These octopuses contain a ...

Octopuses have a few characteristics that make them stand out as one of the most intelligent mollusks in the ocean. These slippery, strange ocean creatures, characterized by their large craniums and ...

With a split-second muscle contraction, the greater blue-ringed octopus can change the size and color of the namesake patterns on its skin for purposes of deception, camouflage and signaling.