As a result of the Global warming, the ocean temperatures rise to abnormal high degrees. According to the National Oceanic and Atmospheric Administration the sea surface temperature rise 0.13°F per decade. As I mentioned before, corals are highly sensitive to temperature changes. As a result of warm ocean conditions, corals show bleaching and a loss of algae as a stress responds. Bleached corals reduce their growth and reproduction and are more vulnerable to diseases. Coral reefs are able to adapt to natural variations in water temperature. However, because of the abnormal increase of the ocean temperatures measured recent years, the corals show a new phenomenon. Whereby a large area is bleached more frequent, intense, widespread and simultaneously. This is called mass bleaching.