Just when you thought it was safe to go back in the pool...  

Set up a movie projector next to the pool and screen the classic, JAWS!  Provide inner tubes, so that residents can lounge in the pool as the Great White terrorizes Amity Island.  If you are feeling adventurous, have one person troll the pool depths, nipping at toes during the most tense movie moments.

Before the movie starts, add in some games of Sharks and Minnows to get the theme going!

We also found this awesome watermelon shark you can try out!

(Idea inspired from:  http://texasskiranch.com/events/jaws-on-the-water-by-alamo-draft-house)