I was intrigued by this, though it is a bit of a stretch to say this is really an economics story–Aussie scientists find coconut-carrying octopus.
Well–sure it is economics–how do we use resources to best advantage? What to do with discarded coconut shells?
Live in them of course.
This is obviously a learned behavior, so it is also interesting to consider how long the discarded coconut shells have been available. As many octopi are using them, they must have taught one another about how best to use the shells.