Why do fish jump?

It was a gorgeous day at Ft. Pickens -- except for about half an hour when the skies grew dark as a rain cloud passed over and drenched me!  That's partially why the video is jerking around - I'm beginning to feel the first drops and scanning the sky around me, but I wanted to capture the moment.

As you can see in the video clip, fish were jumping all over in the surf, either having a great time or trying to escape larger fish feeding on them.  It was driving the Laughing Gulls crazy.

There was a lot bird activity to enjoy throughout the patrol: sea gulls, Great Blue Herons, Snowy Plovers, Least Terns, Black Terns (who appear to still be migrating), and Willet.   Coupled with the fact I found a Loggerhead nest and a false crawl, I'd say life is good!