if by NO you mean Know, I suggest you do some back checking
Yet the reef she saw was substantially degraded in many places from what it was like in the 1980s. According to a report from the Australian Institute of Marine Science, about half of the reef’s coral died between 1985 and 2012.
https://www.washingtonpost.com/national/health-science/the-great-barrier-reef-is-under-siege/2015/03/23/cd478050-bd21-11e4-8668-4e7ba8439ca6_story.html?utm_term=.522d954ae6a6