Coccolithophores are tiny, single-celled marine algae that belong to the group of phytoplankton. They are known for their unique calcium carbonate plates, called coccoliths, which cover their surfaces. These organisms play a crucial role in the ocean's ecosystem by contributing to primary production and serving as a food source for various marine animals. In addition to their ecological importance, coccolithophores are significant in the global carbon cycle. When they die, their coccoliths sink to the ocean floor, sequestering carbon and helping to regulate atmospheric carbon dioxide levels. This process is vital for maintaining the Earth's climate and supporting marine life.