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

Lurking in the ocean's twilight zone - an area between 650 and 3,000 feet below the surface where light rarely reaches - is the seven-arm octopus (Haliphron atlanticus). Also known as the septopus, ...

Instead of sensing neurotransmitters, however, octopus receptors contain important adaptations to sense relatively insoluble, greasy molecules that stick to surfaces. Squid are ambush predators that ...

Octopuses can taste with their arms, and a new study reveals that specifically, they're tasting chemical cues from microbes that grow on the surface of objects like dead crabs and living octopus eggs.