The veined octopus (sometimes called the coconut octopus) exhibits a curious behavioural adaption of using discarded shells, coconuts and sometimes even man made objects for protection. It is believed this is due to the dangerous open nature of the sandy and muddy habitats the octopus inhabits, leaving itself little protection from passing predators. Whilst being carried, the shells offer no protection and place a requirement on the octopus to use a novel and cumbersome form of locomotion. To ca

Just how smart are octopuses? One is put to the test in this watch-and-learn challenge. | National Geographic Animals