The players have to move 1 meeple (diver) from the starting space to space 90. The red spaces have special meanings, which are explained in the game rules. Also explained are several facts about diving and oceanic life. The winner is the player who gets the most playing chips on the red spaces. The game was inspired by the 1956 documentary movie "Le Monde du silence" by Jacques-Yves Cousteau and the invention of the aqualung.