This is a Monster in the House type of story btw, and for who doesn't know what I'm talking about, which is very possible.. you might want to take a look at Save the Cat or its Wiki page. I'm not trying to apply the Blake Snyder formula here though, I'm just using Snyder's terminology. But in short, Jaws is a 'Monster in the House' - type story, with a monster (the shark of course), a 'house' (a small place where the characters can't run away from: the boat, in our case), and a capital sin (which unleashes the monster, directly or indirectly; in our case it's greed, on one hand, if we consider the Mayor/the town, and pride, in the case of the Hunter. Both pay for their sins by the end of the movie. And only the Hero and the Expert stay alive. The Hero, using the Expert's tools and know-how, defeats the monster by understanding it, being careful, aware, and humble when facing this force of nature).
Lastly, what I find most interesting is Spielberg's use of key elements, developed at different moments during the story, like the fear of water or the conflicts between 2 characters (we don't have scenes with a ton of conflict between a lot of characters, just 2 per scene, and then we move to another scene for another conflict, to keep things clear). Information is given to the audience very slowly, bit by bit, postponing things for as long as possible.. It's a shark. It's a big shark. It's a great white. It's a territorial great white who will keep eating until we either kill it, or it kills all of us. And we get to see the monster only towards the end.. for most of the film we see just a fin, barrels dragged through water..
OK, so here we go. 37 scenes, 37 pics, and a minimum of text, trying to underline the essentials.