The amazing octopuses that make their own mobile homes... from coconut shells

http://www.youtube.com/watch?v=0bHZjpjPD1Aendofvid
[starttext]
Australian scientists say the humble octopus may be smarter than previously thought. A study has found that a member of the eight-tentacled species can carry coconut shells as improvised portable armour - the first case of an invertebrate using tools.[endtext]