After Close And Tireless Observations By Scientists, This Octopus Finally Reveals What It Was Guarding

Octopi are some of the most fascinating animals on the planet. Not only are they highly intelligent, but they also show strange and unknowable behavior. A group of scientists watched a mysterious deep-sea octopus sit motionless for just over half a decade, only to discover that it was standing watch over an unexpected hoard of objects. 
What was this octopus guarding that left scientists so amazed?
After Close And Tireless Observations By Scientists, This Octopus Finally Reveals What It Was Guarding