Corals produce polyps that are mobile early in life and wash all over. They won't have any trouble moving if temperatures change. In fact it's already been observed to happen.

https://www.nature.com/news/2011/110121/full/news.2011.33.ht...

Corals are not going to die out in 30 years, 50 years, probably not before humans die out. Corals have been around for a long time and are highly adaptable.

https://en.wikipedia.org/wiki/Fossil_Coral_Reef

For fun you can look at temps and C02 levels during Devonian period. No glaciers, much warmer than today. Very high C02 because carbon we are burning today had not been sequestered yet. Yet a coral reef was formed, a big one.

You'd better call up the IPCC and tell them of your findings, because they believe that 99% of the coral will be dead in a 2° world with high confidence. Currently our emissions are on a path for much stronger warming that even that.

Appeal to authority isn't really an argument though.

I've laid the fact I know of out, you are free to believe what you want.

I'm not an expert on coral reef ecology, and probably neither are you. Believing the scientists who are is the natural choice.