This coconut-carrying octopus off the coast of Indonesia is the first invertebrate in which such intelligent tool use has been observed. Read about the discovery of this surprising behavior here.
"Tool use was once thought to be an exclusively human skill, but this behaviour has now been observed in a growing list of primates, mammals and birds.
The researchers say their study suggests that these coconut-grabbing octopuses should now be added to these ranks. "
National Geographic has another good article on the clever cephalopods.