The researchers filmed the octopus collecting coconut half-shells from the sea floor that had been discarded by humans. They were then carried up to  and arranged around the body of the octopus to form a spherical hiding place similar to a clam-shell.
The researchers filmed the octopus gathering discarded coconut halves from the sea floor. They were then transported to  and arranged around the octopus's body to create a spherical hiding place similar to a clam shell.