Question: Steven Spielberg's 1975 Shark thriller film featured what character, allegedly based on fisherman Frank Mungus?

Context paragraphs:
Minority Report (film): Minority Report is a 2002 American neo-noir science fiction film directed by Steven Spielberg and loosely based on the short story of the same name by Philip K. Dick.  It is set primarily in Washington, D.C., and Northern Virginia in the year 2054, where "PreCrime", a specialized police department, apprehends criminals based on foreknowledge provided by three psychics called "precogs".  The cast includes Tom Cruise as Chief of PreCrime John Anderton, Colin Farrell as Department of Justice agent Danny Witwer, Samantha Morton as the senior precog Agatha, and Max von Sydow as Anderton's superior Lamar Burgess.  The film combines elements of tech noir, whodunit, thriller and science fiction genres, as well as a traditional chase film, as the main protagonist is accused of a crime he has not committed and becomes a fugitive.  Spielberg has characterized the story as "fifty percent character and fifty percent very complicated storytelling with layers and layers of murder mystery and plot".  The film's central theme is the question of free will versus determinism.  It examines whether free will can exist if the future is set and known in advance.  Other themes include the role of preventive government in protecting its citizenry, the role of media in a future state where technological advancements make its presence nearly boundless, the potential legality of an infallible prosecutor, and Spielberg's repeated theme of broken families.

Jaws in Japan: Jaws in Japan (also titled Psycho Shark) is a 2009 Japanese horror film directed by John Hijiri and written by Yasutoshi Murakawa, starring Nonami Takizawa, Airi Nakajima, and Megumi Haruno.  Despite its title, the film has no connection with the 1975 Steven Spielberg film "Jaws" in terms of its plot or its production.  The film has received negative reviews.

Frank Mundus: Frank Mundus (October 21, 1925 – September 10, 2008) was a sport fisherman in Montauk, New York who is said to be the inspiration for the character Quint in the movie and book "Jaws".  Up until his death, he chartered out his boat "Cricket II" for those seeking the thrill of big game fishing.

Jaws (film): Jaws is a 1975 American thriller film directed by Steven Spielberg and based on Peter Benchley's 1974 novel of the same name.  In the story, a giant man-eating great white shark attacks beachgoers on Amity Island, a fictional New England summer resort town, prompting the local police chief to hunt it with the help of a marine biologist and a professional shark hunter.  The film stars Roy Scheider as police chief Martin Brody, Robert Shaw as shark hunter Quint, Richard Dreyfuss as oceanographer Matt Hooper, Murray Hamilton as Larry Vaughn, the mayor of Amity Island, and Lorraine Gary as Brody's wife, Ellen.  The screenplay is credited to both Benchley, who wrote the first drafts, and actor-writer Carl Gottlieb, who rewrote the script during principal photography.

Matt Charman: Matt Charman is a British screenwriter, playwright, and producer.  He was nominated for an Academy Award for best original screenplay for his 2015 film "Bridge of Spies", directed by Steven Spielberg and co-written with Joel and Ethan Coen.  Charman started out writing for theatre, making his breakthrough as writer-in-residence at London’s National Theatre, where then director Nicholas Hytner described Charman as having "a priceless nose for a story."  He recently wrote the pilot episode of "Oasis", a sci-fi drama for Amazon Video adapting Michel Faber's "The Book of Strange New Things", and is working on a second movie for Steven Spielberg's Amblin Partners, based on Walter Cronkite’s 1968 visit to Vietnam.

Jaws 3-D: Jaws 3-D (also known as Jaws 3 or Jaws III) is a 1983 American thriller film directed by Joe Alves and starring Dennis Quaid, Bess Armstrong, Lea Thompson, and Louis Gossett, Jr. It is the second sequel to Steven Spielberg's "Jaws" and the third installment in the "Jaws" franchise.  The film follows the Brody children from the previous films at SeaWorld, a Florida marine park with underwater tunnels and lagoons.  As the park prepares for opening, a young great white shark infiltrates the park from the sea, seemingly attacking and killing the park's employees.  Once the shark is captured, it becomes apparent that it was a second, much larger shark who also entered the park, that was the real culprit.

Jaws (novel): Jaws is a 1974 novel by American writer Peter Benchley.  It tells the story of a great white shark that preys upon a small resort town and the voyage of three men trying to kill it.  The novel grows out of Benchley's interest in shark attacks after he learned about the exploits of shark fisherman Frank Mundus in 1964.  Doubleday commissioned him to write the novel in 1971, a period when Benchley struggled as a freelance journalist.

Frank Marshall (producer): Frank Wilton Marshall (born September 13, 1946) is an American film producer and director, often working in collaboration with his wife, Kathleen Kennedy.  With Kennedy and Steven Spielberg, he was one of the founders of Amblin Entertainment.  In 1991, he founded, with Kennedy, The Kennedy/Marshall Company, a film production company which has a contract with DreamWorks.  Since May 2012, with Kennedy taking on the role of President of Lucasfilm, Marshall has been Kennedy/Marshall's sole principal.  Marshall has consistently collaborated with directors Steven Spielberg, Paul Greengrass and Peter Bogdanovich.

Jaws (franchise): Jaws is an American natural horror film series that started with a 1975 film that expanded into three sequels, a theme park ride, and other tie-in merchandise, based on a 1974 novel.  The main subject of the saga is a great white shark, and its attacks on people in specific areas of the United States.  The Brody family is featured in all of the films as the primary antithesis to the shark.  The original film was based on a novel written by Peter Benchley, which itself was inspired by the Jersey Shore shark attacks of 1916.  Benchley adapted his novel, along with help from Carl Gottlieb and Howard Sackler, into the 1975 film "Jaws", which was directed by Steven Spielberg.  Although Gottlieb went on to pen two of the three sequels, neither Benchley nor Spielberg returned to the film series in any capacity.

Influence of Stanley Kubrick: Stanley Kubrick is regarded by film critics and historians as one of the most influential directors of all time.  Leading directors, including Martin Scorsese, Steven Spielberg, George Lucas, James Cameron, Woody Allen, Terry Gilliam, the Coen Brothers, Ridley Scott, Paul Thomas Anderson, Christopher Nolan, David Lynch, and George A. Romero, have cited Kubrick as a source of inspiration, and in the case of Spielberg, collaboration.  In an interview for the "Eyes Wide Shut" DVD release, Steven Spielberg comments that "nobody could shoot a picture better in history", and that Kubrick told stories in a way "antithetical to the way we are accustomed to receiving stories".  Writing in the introduction to a recent edition of Michel Ciment's "Kubrick", film director Martin Scorsese notes most of Kubrick's films were misunderstood and under-appreciated when first released, only to be considered masterpieces later on.

Supporting paragraphs: Frank Mundus Jaws (film)
Answer: Quint