Longest Global Coral Bleaching On Record Isn’t Over Yet (published February 23rd, 2016)

Coral reefs have had a rough run over the past two years.  Climate change has ratcheted up ocean temperatures and El-Nino helped kick them into overdrive in parts of the world. All that heat kicked off what has been a major coral die-off around the globe. While El Niño has passed its peak, scientists have warned that the global coral die-off, known as coral bleaching, is still far from over. What began in 2014 is projected to continue through this year and even into early 2017.
This is the third global bleaching event on record. The others were in 1998 and 2010, both El Niño years. El Niño, which is marked by warmer than normal waters in the tropical Pacific, has certainly played a role. The steady background creep of ocean warming due to climate change, however, is also an important factor. More than 90 percent of the accumulated heat due to climate change is ending up in the oceans and its effects are being acutely felt.
http://www.climatecentral.org/news/longest-global-coral-bleaching-20062