Many natural and human-induced factors can harm reefs

• Bioerosion by fishes and other marine organisms

• Diseases

• Storms

• Overfishing

• Coastal development

• Pollution

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Several frequently observed conditions have been identified as harmful

to corals: black band disease (BBD), white band disease (WBD), bioerosion,

and coral bleaching. These conditions are all stress-related. However,

anthropogenic, or human-caused, stresses can increase a coral's

susceptibility to these conditions.