Pogodzid's article points to a cheesy but none-the-less interesting site:
http://www.reefball.org/
This link has a bunch of photos of the reefballs in action:
http://www.reefball.org/album/==) Non-Geographic defined Photos/bestpictures/index.html
http://www.reefball.org/
This link has a bunch of photos of the reefballs in action:
http://www.reefball.org/album/==) Non-Geographic defined Photos/bestpictures/index.html