It took some time for Steven Spielberg to cast one legendary role in Jaws, and his eventual choice almost caused a fistfight on set. Jaws is all about a deadly shark making its way through the fictional New England beach town Amity Island and hunting everyday people along the way. It was a surprise success, drawing in over $475 million at the box office across various releases in 40 years, while the strength of its premise, characters, and cast launched Jaws into the public consciousness and served as Spielberg's ascension as a standout Hollywood director.

https://screenrant.com/jaws-movie-robert-shaw-casting-concerns-steven-spielberg-explained/