But scientists are having a hard time illustrating these problems as shifting baselines continue to redefine what is considered normal for reef health.
Australian scientists now report that coral cover on the Great Barrier Reef has fallen sharply in all three sections of the reef for the first time in 35 years of continuous monitoring.
The International Seabed Council once again failed to come to an agreement over the rules to govern the practice of mining valuable resources in deep ocean habitats.
As a result of rising ocean temperatures coral bleaching is becoming more common, and it's causing a biotic homogenization of local fish populations.
New research shows the extent to which our dependence on plastic is infecting, damaging, and killing coral reefs from Thailand to Australia.