The Fishbone is a naturally spawning Item and the Shipwrecked DLC's counterpart to the Eye Bone. When it is picked up, it will summon Packim Baggims, the Shipwrecked version of Chester. The Fishbone can spawn on any island, except the starting island. If Packim Baggims is killed, the Fishbone will take on a gray appearance.
The Fishbone does not sink when placed in water and cannot be destroyed by falling Dragoon Eggs. Prime Apes will not steal the Fishbone and Lureplants will not eat it. Krampus can only steal the Fishbone if it is in a Backpack.
The Fishbone can not be brought to new worlds, and will turn to Ashes if in the player's inventory when the Teleportato is activated. When jumping to a base game world or Reign of Giants world using the Seaworthy or to a Hamlet world using the Skyworthy, the Fishbone will be dropped before leaving. Packim Baggims can not be brought to a base game, Reign of Giants or Hamlet world.