Indonesia, which possesses some of the most biodiverse coral reef ecosystems on the planet, is intensifying efforts to preserve them. Support for this work is being provided by the British International Climate Finance (ICF) initiative, aimed at funding climate projects in developing countries. Indonesia's coral reefs play a key role not only for marine ecology but also for the lives of millions of people. They ensure food security for coastal communities, serve as a source of sustainable income through fishing and tourism, and function as a natural barrier protecting the coast from the destructive impacts of storms and rising sea levels. As part of cooperation with ICF, Indonesian authorities and partners are scaling up already tested solutions for reef protection, seeking to extend successful experience across a larger territory of the country. This includes measures to restore damaged ecosystems, reduce anthropogenic pressure on coastal waters, and implement practices of sustainable marine resource management. Such initiatives are becoming particularly significant against the backdrop of global climate change, which poses a serious threat to coral ecosystems worldwide due to rising ocean temperatures and ocean acidification. Indonesia, as a country with the largest areas of coral reefs, is becoming an important platform for developing climate adaptation models that could subsequently be applied in other regions of the world.