A South Korean coastguard officer was stabbed to death while trying to seize a Chinese fishing boat, the latest in a series of deadly clashes over diminished fishing stocks in the Yellow Sea, The Guardian reported. The officer was killed and another injured while trying to board the Chinese boat, which was fishing illegally about 55 miles from Socheong Island, the South Korean coastguard said. The casualties and crew – including the Chinese boat captain, who was allegedly responsible for the stabbing and then injured in the fight – have been taken to Incheon, west of Seoul. South Korea has seized about 470 Chinese ships that have ventured into Korean waters in the Yellow Sea this year, up from 370 in 2010. The disputes center on competition for mackerel, jellyfish, croaker and anchovy, which have become increasingly lucrative markets due to growing Chinese demand.