Coral reefs: A maker of changing ecosystem

• Corals with high N levels create the situation of nutrient starvation syndrome. • Ocean acidification condition produces excess CO 2 , more HCO 3 - , and less CO 3 2- ions. • Around 55% of world's coral reef species are endangered by overfishing. • Various app and video game such as the NeMO-Net team help to defend coral reefs. Coral reefs are the backbone of the economies of tropical regions. The structure of coral reefs saves property damage, loss of life, and erosion problems by buffering the shoreline against 97% of the energy from storms, waves, and floods. They act as the arsenal of very powerful chemical weapons to defend themselves. Healthy coral reefs not only support the ecosystem on Earth but also give a platform to commercial and subsistence fisheries. Monitoring coral reef status and trends is very crucial to notify the policy, management, and science so the cause of the collapsing of the reef system needs to be addressed. In the current scenario, the coral reefs are going through the bad phase of over-fishing, climate change, pollution, excess nutrients, etc. By controlling these factors with the additional help of modern era tools (various apps), we can minimize the effect of the above raising factor and save the world's most spectacular beauty: The corals just to keep oceans fairly blue. As coral reefs are for each and everyone, so everyone makes sure to secure the life of coral reefs.