John Williams composed the main theme for the "Jaws" franchise. It can be found on the original soundtrack for "Jaws", released in 1975 by MCA.
The main theme from "Jaws" was composed to represent the "unstoppable force" of a shark attack, according to Williams. Another famous song from the soundtrack includes the main "shark" theme, consisting of only two musical notes.
The "Jaws" franchise of films was created by Steven Spielberg. The first in the series was released 1975 and stars Roys Sheider and Robert Shaw. The original "Jaws" movie is based on Peter Benchley's novel of the same name.