Juergen Freund / Bleached Staghorn corals (Acropora cervicornis), Great Barrier Reef, Australia, 2017.

Michael Pitts / Tracking shot over bleached Table coral (Acropora), Maldives, Indian Ocean.

Juergen Freund / Split level image of shallow bleaching corals at sunset, New Ireland, Papua New Guinea

Juergen Freund / Split level of coral reef and island showing bleaching of shallow corals caused by temperature rise, New Ireland, Papua New Guinea June 2010.

Juergen Freund / Hard corals showing bleaching caused by heat stress, West New Britain, Papua New Guinea, May 2010.

Juergen Freund / Clown anemonefish (Amphiprion percula) on bleached coral, Komodo NP, Indonesia, Indo-pacific.

Juergen Freund / Shallow bleaching corals, split level with the island, Lissenung, New Ireland, Papua New Guinea, June 2010.

Juergen Freund / Diver lowering an artificial reef made of ceramic snowflakes to help rejuvenate the dead reef of El Nido. The 1998 El Nino caused a massive scale coral bleaching to this tourist town that used to have...

Juergen Freund / Split level of shallow bleaching corals and island, New Ireland, Papua New Guinea, June 2010

Georgette Douwma / Pink anemonefish (Amphiprion perideraion) with anemone showing the effects of bleaching. The bleached anemone is almost white, whereas the unbleached anemone is brown due to the presence of symbiotic...

Chris Newbert / Blackfinned Clownfish (Amphiprion percula) in bleached Magnificent Sea Anemone (Heteractis magnifica) host, Papua New Guinea

Birgitte Wilms / Blackfinned Clownfish (Amphiprion percula) in bleached Magnificent Sea Anemone (Heteractis magnifica) host, 30 feet deep, Papua New Guinea