The Caelum Coin is a Constellation Coin in Endless Ocean: Blue World. It is found under a zoom-mode glow in the Cortica River area at coordinates A-1, in an area near the entrance to the Mangrove Maze.
- This constellation is one of several noted by French astronomer Nicolas Louis de Lacaille. Its name means "chisel" in Latin, and it was formerly known as Caelum Scalptorium ("the engraver's' chisel"), but was eventually shortened.
- The Caelum constellation is bordered by Dorado and Pictor to the south, Horologium and Eridanus to the east, Lepus to the north, and Columba to the west.