Until this point, it seemed, the restless fish had been feeding mostly on the dead, tearing at the bodies as they fell to the ocean floor. Or they had concentrated on lone, straying swimmers. But now the sharks were starting to home in on the large groups that had amassed during the past thirty-six hours. Those sailors who were naked or not fully clothed were at greatest risk of attack. The fish keyed in on color contrasts, such as that between a pale body and a blue sea.
