I forgot the caption.
The first image shows healthy coral; the second bleached (these coral polyps are pink); then dead (a thin film of algal overgrowth, not recovery).
Oh! How awful!
I snorkeled in a Carribean coral reef, and it was the most exciting time I can remember. Turtles, yellow-fins, blue fish, star fish, on and on! with the ebb and flow of the ocean swales, kind of a rocking experience, while watching sea life swim all around me.
Joan, the joy of reef tourism is becoming a thing of the past. You were lucky to visit when it was good.