Octopus With a Big Dilemma - Behavior Observation Test

The octopus in this observation aquarium is Arnold. He's a new octopus here at Octolab. He absolutely loves his barrel and spends hours just hanging out and observing the people around him. We wanted to know what would happen if we removed his barrel, filled it with obstacles, and added another hideout. Would he just use the new hideout or would he try to make himself comfortable in his trusty old barrel?