Paradise Cove in Freeport, Bahamas is embarking on a reef rehabilitation project using reef balls. This video highlights their work and the success of the project.
You can adopt your own reef ball at their website:
departures by airtone (c) copyright 2015 Licensed under a Creative Commons Attribution Noncommercial (3.0) license. dig.ccmixter.org/files/airtone/50496 Ft: speck