Permanent dead zones are where the condition of hypoxia cannot be reversed. These sections of the ocean are deprived of oxygen all-year round and the marine life diversity is very low. The oxygen levels in these waters rarely rise above 2 milligrams per liter. An example of a permanent dead zone in the making is the Gulf of Mexico. A lot of factors have contributed to the creation of a dead zone in the Gulf such as oil spills and pollution. If the dead zone expands over here, America's fishing industry will be impacted greatly since marine animals cannot live in oxygen deprived conditions.