Massive coral bleaching across the world's oceans during the past year's extremely warm water temperatures was labeled a “global coral bleaching event” by federal officials on Monday.

Almost half of warm-water reef-building coral species are at risk of extinction, conservationists have warned after a global assessment announced at the UN climate conference. The conservation ...

These events, which are spurred by warming waters, pose a dire threat to coral life, researchers reported Wednesday (March 15) in Nature. When ocean waters warm, coral start to expel photosynthetic ...

State aquatics officials found signs last week of coral bleaching, such as with this reef off South Maui. When the ocean is too warm, coral will expel algae living in their tissues, causing the ...