Complex sentence: Seven of the nine known species of giant clams in the world are found in the coral reefs of the South China Sea in Sabah (Malaysian Borneo) where a programme to propagate endangered giant clams for release into the wild has been ongoing since 2007.
Split into simpler sentences: Seven of the nine known species of giant clams in the world are found in the coral reefs of the South China Sea. A programme to propagate endangered giant clams for release into the wild have been ongoing since 2007.