1. The shark's name is Bruce.
2. Originally, the movie was supposed to prominently feature a mechanical shark.
3. When Spielberg first heard the now famous two note theme, he laughed thinking it was a joke.
4. The film is said to be one of Fidel Castro's favourites.
5. Unhappy with one scene, Spielberg re-shot it in film editor Verna Fields' swimming pool, using his own money to pay for the shoot.
View this video on YouTube
6. Some of the original proposed titles for the book Jaws were "Silence in the Water", "Wha's That Noshin' On My Laig", and "The Jaws of Leviathan."
7. The movie is considered the world's first-ever summer blockbuster.
8. Steven Spielberg skipped being present for the final scene of shooting, fearful that the cast and crew would throw him in the water.
9. Spielberg's dog, Elma, makes a super brief cameo as Brody's dog.
10. Speaking of cameos, author and writer of the book the movie is based on, Peter Benchley, also has a small role in the film.
11. Peter Benchley later became a shark conservationist, due to the negative publicity the movie generated towards sharks.
12. The line "you're gonna need a bigger boat" was ad libbed by Roy Scheider.
13. The movie was originally to be directed by Dick Richards, but he was fired by producers for repeatedly referring to Jaws as a whale.
14. Charlton Heston very nearly got the role of Brody.
15. Richard Dreyfus was not the first choice to play Hooper. Jeff Bridges, Jon Voight, and Timothy Bottoms were all approached for the role first.
16. Scheider himself first heard about the role when he overheard Spielberg describing the movie at a party.
17. Shooting of the movie was scheduled to last 55 days, but ended up taking 159.
18. The shark doesn't fully appear on camera until 1 hour and 21 minutes into the film.
19. The film's budget was $3.5million, but ended up costing close to $9million.
20. Not that it mattered too much: The movie ended up making more than $471million – a record at the time.
