With a scream of rage, Attila dove forward, going for her throat with both hands. Ruby whipped out her homemade plastic shiv and stabbed for his stomach. He dodged, she missed, and the two collided, cursing and wrestling, food containers splashing into the sea as they fought over possession of the razor-sharp knife in their inflatable rubber raft. Nearby, a shark fin cut the water and began to circle the bouncing dingy. But the two cursing combatants were much too busy to notice the presence of the third killer. Not yet anyway.