Your article is unbalanced and biased. Although coral dies off at higher temperatures, those temperatures (about 90) have generally not been reached. Coral bleaches at temperatures approaching 90 degrees, and this has been happening in the great barrier reef and Idian Ocean in repeated episodes.
Under water chicken-little articles are easy since the public knows so little about it.
So, you'd suggest the public should avoid the popular media, and get there news directly from the scientists? Fine, here is the early report from NOAA that came out last fall:
http://www.noaanews.noaa.gov/stories2005/s2526.htm
Not much there in your article. So "80-95 percent of coral colonies were bleached in some reef areas". So what? Did the warm ocean cause it? Are the oceans warmer than past events? Unlikely since these are strictly local phenomena, and the satellite monitoring started in 1997. From the NOAA link in your article:
The bleaching events reported prior to the 1980s were generally attributed to localized phenomena such as major storm events, severe tidal exposures, sedimentation, rapid salinity changes, pollution, or thermal shock. The events since 1980 have not been so easily explained. http://www.coralreefwatch.noaa.gov/satellite/index.html IOW, before the 1990's it wasn't fashionable to blame everything on man-made global warming and now it is. Here's a more balanced perspective: Fears fade on Barrier Reef bleaching disaster