From the octopus that walks on land to another that grows its own ‘lifejacket’, discover these unusual species ...

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 ...

Paul Rudd (left) and a shot of a mimic octopus featured in National Geographic's Secrets of the Octopus (right) Actor Paul Rudd knows what it takes to transform into another person for a role, and ...

The algae octopus (Abdopus aculeatus), also called the prickly octopus, lives in the Indo-West Pacific. Despite its modest size — its mantle (main body) is only 3 inches long with arms stretching up ...