The following is from a work-in-progress called "Moby Dick: a Book Report" in which I read each chapter of Herman Melville's classic novel Moby Dick, and write about what I read.
Apparently, after a whale is killed, it’s common for sharks to gather and feed upon its corpse, and this is exactly what happened to the whale Stubb killed. To prevent the sharks from completely eating the whale, Stubb and Queequeg stood on the ship’s edge above the whale with long sharp lances and killed as many sharks as they could. It was a horrible, bloody mess, but necessary to protect the whale from being eaten.