L'ultimo squalo
When a 35-foot great white shark begins to wreak havoc on a seaside town, the mayor, not wanting to endanger his gubernatorial campaign, declines to act, so a local shark hunter and horror author band together to stop the beast.
Starring James Franciscus, Vic Morrow, Micaela Pignatelli, Joshua Sinclair, Giancarlo Prete, Stefania Girolami Goodwin, Gian Marco Lari, Joyce Lee, Massimo Vanni, Ennio Girolami
Watch "L'ultimo squalo" on Amazon released in 1981. It's a horror and thriller movie, and has a rating of 4.3 out of 10 from Imdb which is fairly low for this kind of movie, and is currently only available for purchase or rent.