Warming oceans bleach coral reefs

A school of Manini fish pass over a coral reef at Hanauma Bay in Honolulu, Hawaii. Water pollution, ocean acidity caused by global warming are killing coral reefs.

(Photograph:Getty)

A researcher uses a dropper to feed Acropora coral in a lab as he studies multiple climate stressors and their impact on coral reefs.

(Photograph:Getty)

A parrot fish feeds off the coral. Fish are dependent on coral for food and security.

(Photograph:Getty)

A Hawksbill sea turtle is seen swimming on January 15, 2012 at Lady Elliot Island, Australia. They are inhabitants of coral reefs and eat sponges.

(Photograph:Getty)

A University of Miami team places a piece of Orbicella Faveolata coral into a holding tank after collecting the sample from a living coral reef off the South Florida coast.

(Photograph:Getty)

Peter Gash snorkels with Oliver Lanyon and Lewis Marshall during an inspection of the Coral Gardens reef located at Lady Elliot Island, north-east of Bundaberg in Queensland.

(Photograph:Reuters)

Clown fish depend on coral to stay protected from predators. With coral bleaching, such organisms face loss of habitat.

(Photograph:Getty)