Whoever wrote this made most of it up and left out a simple fact: it's pollution, not temperature that is killing the coral. You can verify this by reading about the way the coral is actually dying in biology papers. It's immune system is compromised and falls to a secondary infection.

1) Coral has geens it was switch on to cope with heat. It has been around for nearly all of earth's history and it's been a LOT hotter than now.
http://www.sciencemag.org/content/early/2014/04/23/science.1251336/a>

2) Coral makes it's own sunscreen, see:
Mason_1998 - http://www.sciencedirect.com/science/article/pii/S1095643398100697
Dunlap_2013 - http://www.tandfonline.com/doi/abs/10.1179/135100099101535142
Schick_2002 - http://annualreviews.org/doi/abs/10.1146/annurev.physiol.64.081501.155802

3) Coral compensates for pH by simply eating more. Anybody that keeps coral in a tank knows this. That kid at the pet shop knows more than the guy that wrote this article!
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0123394

4) This NSF paper should be a big clue for you:

"With each location they found that the seawater became increasingly more acidic as they moved toward land."
http://nsf.gov/news/news_summ.jsp?org=NSF&cntn_id=130129&preview=false

Global? If it's only near shore it's global noting it's man. This is pollution. Nothing to do with warming. Which makes sense because the bleached areas come back by simply monitoring them. Polluters can't dump and the grow back. Every time.

5) What's killing the great barrier reef ("GBR") ? In the 1960s the Time Life book on the ocean said it was the crown of thorns starfish, Acanthaster planci. In the 1980s the Australian government admitted it was pollution not the starfish.

The government has a plan to remediate the reef by 2040 - here re their documents which do not mention climate once, instead they mention agricultural runoff, pesticides, fertilizers, silt, and all sorts of chemical goo. In other words it's still pollution that's killing the GBR despite what PR releases industry crank out.

The greatest water quality risks to the Reef are:
– excess nutrients (especially nitrogen from fertiliser),
– fine sediments, and
– pesticides."

http://www.gbr.qld.gov.au/documents/costings-report.pd
http://www.gbr.qld.gov.au/documents/gbrwst-finalreport-es-2016.pdf

6) Compare this with Cuba.

http://www.pri.org/stories/2015-02-02/coral-coast-cuba-flourishing-rare-glimmer-hope-threatened-ecosystem

“After the Soviets pulled out [in 1991], Cuba couldn't afford fertilizers and pesticides, so they were essentially forced into organic farming — and that's had a beneficial effect on corals,” Guggenheim explains. The result has been far less nutrient pollution in the ocean waters surrounding Cuba. Nutrients in the water do the same thing in the ocean that they do on land: They fuel the growth of plants and algae — and in the ocean those algae overgrow and ultimately kill coral reefs.

The other reason Cuba's coral reefs are so healthy is that they have fantastic environmental laws in place, Guggenheim says. Twenty-five percent of their waters are marine protected areas, compared to the worldwide average of about 1 percent. “They are very good stewards of their environment, and I have faith in them to continue that,” he adds.

Coral Reefs in the Caribbean have been hit particularly hard. Since 1970, about half of the coral cover in the region has disappeared, including almost 95 percent of the spectacular elkhorn coral. Rising ocean temperatures and pollution cause bleaching in coral, which is usually a death sentence. But even in areas around Cuba where researchers see bleaching, the coral tends to recover — a sign of how healthy the ecosystem is.

It's not temperature or acidity killing the coral, it's pollution.

Corporations lie and say it's climate.