<P> However, Benchley later regretted he ever wrote the original book considering it encouraged a widespread public fear of sharks, which led to massive culls resulting in the various shark species around the world becoming endangered . As such, he spent most of his life promoting the cause of ocean conservation . </P> <P> The original Jaws, directed by Steven Spielberg, is based on Peter Benchley's novel of the same name . It tells the story of Police Chief Martin Brody (portrayed by Roy Scheider) of Amity Island (a fictional summer resort town), in his quest to protect beachgoers from a great white shark by closing the beach . This is overruled by the town council, headed by the mayor (Murray Hamilton) that wants the beach to remain open in order to sustain the local tourist economy . After several attacks, the police chief enlists the help of marine biologist Matt Hooper (Richard Dreyfuss) and a professional shark hunter Quint (Robert Shaw). The three voyage out onto the ocean in Quint's boat--the Orca . The shark kills Quint, but Brody manages to destroy it by shooting at the highly pressurized air tank that he has wedged in its mouth . In the end, Brody and Hooper are seen swimming away from the sinking Orca, having both of them managed to survive uninjured the shark attack on the boat . </P> <P> The first sequel, Jaws 2, depicts the same town four years after the events of the original film when another great white shark arrives on the shores of the fictional seaside resort of Amity Island . Directed by Jeannot Szwarc and starring Roy Scheider again as Police Chief Martin Brody, who, after a series of deaths and disappearances, suspects that the culprit is another shark . However, he has trouble convincing the town's selectmen . He has to act alone to save a group of teenagers, including his two sons, who encounter the shark whilst out sailing . </P> <P> The plot of Jaws 3 - D (also known as Jaws 3) moves away from Amity Island to SeaWorld in Florida, a water themed - park with underwater tunnels and lagoons . As the park prepares to open, it is infiltrated by a baby great white shark which attacks and kills water - skiers and park employees . Once the baby shark is captured, it becomes apparent that a much larger shark, the mother, is present . The characters of Martin's sons from the first two films are developed further in this film: Michael Brody (Dennis Quaid) is the chief engineer of the park and his younger brother, Sean (John Putch), arrives at the resort to visit him . The events of the earlier films are implied through Sean's dislike of the water because of "something that happened when he was a kid ." The events and character development from Jaws 3 - D are independent from the rest of the series . </P>

Is it the same shark in all jaws movies