The Incredible Walking Octopus

This is the extraordinary behaviour observed for the first time in two species of octopus.
The two species have slightly different strategies. Octopus marginatus from Indonesia wraps itself into a ball while walking, perhaps to imitate a coconut rolling with the current.
Tiny Octopus aculeatus of Australia holds up six of its arms to disguise itself as a clump of seaweed, while walking at up to 14 centimetres per second - faster than it can manage using more than two arms.