I mean, if climate alarmists get to use it, it only seems fair...
This has nothing to do with what's fair - you can't "both sides" something we have direct and increasing evidence of.
This isn't caused by some Jewish space lasers, experimental military weaponry, or whatever additional conspiracy you're implying.
Whatever extent reef size is evidence of the extant of global warming, that works both ways.
It's either a reliable indicator or an unreliable indicator. Apparently, an unreliable indicator.