There is this book called "Last Chance to See". it was written by a British comedian documenting a number of trips he did to see a few charismatic vertebrates threatened with extinction. However he didn't include the Great Barrier Reef. Given the last round of bleaching, and the high chance of another event (not to mention issues with crown of thorns starfish and run off) perhaps he should have. http://www.sciencealert.com/heartbroken-scientists-admit-the-great-barrier-reef-is-now-terminal