To improve the ecological environment and create a rich habitat for marine life, Hainan has been making artificial reefs with sunken ships. The artificial reefs projects can improve the ecological environment of the coastal water and turn the sandy and muddy seabed, where fewer fish species live, into rocky reefs suitable for the survival of more species. Artificial reefs with abundant fish food are beneficial for the reproduction and growth of aquatic animals. And it can also prevent excessive fishing by bottom trawlers, protecting fishery resources.