The Harpoon's Hook is a Treasure that can be found in the online Atlantis game Ocean Floor Explore and placed in the Treasure Chest. It was lost in a battle involving the guardians of Atlantis and most likely Artimus Rhodes
Lost during a fierce battle between the Atlantis Warriors and Treasure Hunters attempting to steal from the Temple of Atlantis, the harpoon's hook lays hidden by rocks and seaweed on the ocean floor. though it was heavily damaged in a chaotic fight, it would still make an excellent trophy for those sharp enough to find it.
- The "Chaotic Fight" was probably when Artimus fought the Manta Warriors as it says in his journal.
- The 2011 set 7985 Temple of Atlantis set is mentioned, and Artimus was probably trying to steal the Golden King.