While Australia’s Great Barrier Reef gets a lot of attention, the vast Mesoamerican Reef seems to be less well-known. Situated closer to where we call home, the reef stretches alongside the coasts of Mexico, Belize, Guatemala and Honduras. The Mesoamerican Reef is the second-largest barrier reef in the world, behind only the GBR.
Both reefs are under assault from over-fishing, destructive forms of tourism, pollution, and global climate change. Awareness of the problems is growing, however, and the BBC has an informative article on the growing efforts to save the Mesoamerican Reef: http://www.bbc.com/earth/story/20141128-the-other-great-barrier-reef