Scientists are making progress in gaining that understanding thanks to a combination of this satellite - derived information and some recent aerial and underwater surveys of the Great Barrier Reef. (earthobservatory.nasa.gov)
Maybe someday soon acoustic underwater surveys will be to coral reefs what satellite imagery is to the survey of ground ecosystems. (treehugger.com)
Coral bleaching on the northern Great Barrier Reef as seen from under water during underwater surveys in March 2016 (coralcoe.org.au)