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

At first glance, this small octopus appears harmless, even endearing. Beneath that appearance lies a biological defense capable of causing severe harm in humans. Its venom is delivered through a bite ...

The blanket octopus uses venomous man o’ war tentacles as weapons, doubling its reach and surviving in the open ocean.