ethology

In 2009, researchers in Indonesia documented octopuses that were carrying around pairs of half coconut shells, which they used as portable Quonset huts. With obvious effort, the octopuses would lug the shell halves, nested one inside the other, beneath their bodies as they walked stiff-armed across the sandy bottom, then assemble the half shells

wild octopuses who live in tidal areas often haul themselves out on land in order to visit different tide pools for better hunting. They may also do this to escape predators in the water, such as another octopus. I had read that in areas blessed by constant ocean spray, an octopus might be able to survive out of water for thirty minutes or more.