Half above & half below view of waves breaking over the reefs of Cu Lao Xanh island (Quy Nhon province, Vietnam), revealing a small colony of young coral reef beneath the waves, which is the beginning and the hope of a future coral reef ecosystem in the area, is growing in the coastal area of Cu Lao Xanh island. Coral reefs are among the most vulnerable, as they are extremely sensitive to seawater temperature, global warming & other environmental factors.