Moby Dick, a novel by Herman Melville, is the story of the obsessive quest of Ahab, captain of the whaler the Pequod, for revenge on Moby Dick, the white whale that on the previous whaling voyage bit off Ahab's leg at the knee.
The Old Man and the Sea is a novel by Ernest Hemingway tells the story of a battle between an aging, experienced fisherman, Santiago, and a large marlin.