eat fish != depend on reefs for fish. They have very developed commercial fishing not subsistence reef fishing.

It's not specific to reefs, although they may be hit hardest. Acidification and warming temperatures have much broader impacts on biodiverity. The point people miss is that fighting climate change is actually a fight to extend the amount of time before we have even more significant losses to biodiversity.

There are significant conflicts over water (https://reliefweb.int/report/world/editor-s-pick-10-violent-...). I'd expect those to extend to food too, and be acute in some regions.

I couldn't reply to the other poster (nogabebop23) that was making the point that they don't depend on reefs, but their point is moot because this is a global issue with different impacts at each latitude.