Seeing garbage littering the undersea landscape was sad enough on its own, but Sigurdsson realized that this particular piece of trash was putting lives directly at risk.
Not only was it failing to adequately conceal the octopus, any predators looking for an easy meal would likely end up ingesting the cup as well.
So, Sigurdsson and the group got to work. They spent the remainder of their dive scouring the seabed for a more fitting home — gently offering the octopus different clamshells until he found one to his liking.
Here's that sweet process on video: