Over 150 Chinese fishing vessels lay at anchor on Thursday after illegally working overnight in waters only around 300 m off Korea's Yeonpyeong Island.
They were so close to the Korean shore that their conversations could be heard by anglers there.
Chinese trawlers crossed the Northern Limit Line for several days, a resident said. "But the Korea Coast Guard seems too busy to come and stop them in the aftermath of the ferry disaster."
"Yeonpyeong Island has become Chinese territory," he added.