You have just found the treasure on the sea bed, and now you have to defend it! You control a diver at the bottom of the screen, and there is a giant octopus and a shark and you have to deal with. Every time an octopus tentacle touched the bottom of the screen, or a shark catches your treasure will be lost. To deal with these creatures, your diver spear. You should make sure that you will shoot the shark before it can do so at the bottom of the screen and catch you (the shark again appears at the top of the screen each time it is removed.) Octopus tentacles are coming down; every time a tentacle shot will fall back to the top, so you have to shoot at the tentacles before reaching the bottom. Of course, your diver has a limited supply of air. Your companion in the boat on the surface, and sometimes throw down the air line. You have to catch it to replenish the air before it is over (if you run out of air, some of the treasures will be lost). The game ends when you lose all of your treasures.