Bull shark being able to tolerate the high salinity of marine water. Since bull sharks often dwell in very shallow waters, are found in many types of habitats, are territorial by nature, and have virtually no tolerance for provocation, they may be more dangerous to humans than any other species of shark, and along with the tiger shark and great white shark, are among the three shark species most likely to bite humans. One or several bull sharks may have been responsible for the Jersey Shore shark attacks of 1916, which were the inspiration for Peter Benchley's novel "Jaws". The speculation of
Friday the 13th (franchise) become more effective. Since Mrs. Voorhees, the killer in the original "Friday the 13th", does not show up until the final reel of the film, Manfredini had the job of creating a score that would represent the killer in her absence. Manfredini was inspired by the 1975 film "Jaws", where the shark is not seen for the majority of the film, but the motif created by John Williams cued the audience as to when the shark was present during scenes and unseen. While listening to a piece of Krzysztof Penderecki music, which contained a chorus with "striking pronunciations", Manfredini was