From AFP:
Raw sewage and pollution from agricultural run-off polluted 83 percent of China’s coastal waters in 2008, according to state media.
China’s coastal waters last year witnessed 68 red tides, or algae blooms, which feed off nutrients found in excess pollution and sap water of oxygen, killing off large amounts of sea life, Xinhua news agency said.
The State Oceanic Administration was cited as saying the algae blooms covered 13,700 square kilometres (5,500 square miles), an increase of more than 2,100 square kilometres over 2007, the report said.