Carter, Susan, and Preacher make it to the surface to find that Aquatica has been totally demolished and parts of it are on fire. Carter and Susan pull themselves out of the water, but the last "smart shark" gloms onto Preacher's leg. Preacher uses his crucifix necklace to poke out its eye, and the shark eventually drops him. He is pulled out of the water, and Susan tends to his wounds. Carter realizes that the sharks have been herding them, getting them to flood the lower decks and partially sink the structure. He also sees that the upper fences are made of ordinary steel rather than titanium and that the shark is ramming them in an attempt to get free. The three survivors realize that they have to kill the shark so that it isn't allowed to roam the open sea. Carter fashions a harpoon containing explosive powder from flares and attaches it to a cable. It is his plan to harpoon the shark and then ignite the powder by connecting the other end of the cable to a battery. Unfortunately, the shark is still ramming the fence and is out of range. Susan cuts her hand and then jumps into the water in order to bait the shark away from the fence. When the shark comes after her, she tries to climb out of the water, but the ladder breaks and the shark eats her. Carter leaps in the water in hopes of saving her, and the shark attacks him. He grabs on to the shark's dorsal fin, and Preacher harpoons the shark, hitting Carter's leg at the same time. The shark slips through the hole in the fence, leaving Carter behind. Preacher then attaches the cable to the battery, and the shark is blown to bits. In the final scene, as Carter and Preacher lay on a piece of floating platform, a boat can be seen approaching. Carter says that he's going to quit this job, Preacher says that he's going back to the ghetto, and they both exclaim, "Amen!"