here is the article about the depletion of the coral reef. Due to climate change and the use of coal. Thank god it has nothing to do with exporting coral or fishing of fish for our hobby.
http://thinkprogress.org/climate/2016/06/27/3792969/scientists-tell-australia-save-coral-reefs/
http://thinkprogress.org/climate/2016/06/27/3792969/scientists-tell-australia-save-coral-reefs/