What did the observed octopuses use the coconut shells they carried for?

Details

The key observation was that the octopuses carried items that they would use later, rather than receiving protection from them during transport. They assembled the coconut shell halves into a shelter only when needed. Carrying the shells required a cumbersome movement the researchers called “stilt-walking.”

The researchers presented this behavior in the context of tool use: carrying an object for later use, rather than merely using something already at hand. The abstract reports repeated observations, not an experiment comparing octopuses with and without shells. It does not specify the species, number of animals or observation setting, so the finding should not be extended to all octopuses. Nor does it establish what the animals understood about their future needs.