Thousands of Chinese fishing vessels have been observed conducting coordinated manoeuvres in the East China Sea, raising concerns among security analysts that the activity may be linked to preparations for a potential regional crisis involving Taiwan. Researchers analysing ship-tracking data say that between 1,300 and 2,000 vessels formed long parallel lines roughly 300 kilometres northeast of Taiwan on at least two occasions in recent months.
The first such formation was recorded on December 25, 2025, followed by another on January 11, 2026. The vessels were identified through their Automatic Identification System signals and reportedly held their positions for nearly 30 hours despite strong winds approaching gale force. According to reports, the conditions were severe enough to force fishing boats from South Korea to return to port, yet the Chinese vessels remained in formation before eventually dispersing.
The scale of the manoeuvre was far larger than a similar incident in 2016 when about 200 to 300 Chinese fishing boats gathered near the Japan-administered Senkaku Islands, which are claimed by China as the Diaoyu Islands. Observers say the recent activity suggests a level of coordination rarely seen among civilian fishing fleets.
Chisako Masuo, an expert on Chinese maritime policy at Kyushu University, said the mobilisation appeared unusually large and could be interpreted as a form of pressure on both Taiwan and Japan.
Satellite data analysts also noted that the formations looked artificial rather than natural. Jason Wang, chief operating officer of the satellite analytics firm ingeniSPACE, said the straight-line formations were highly unusual for fishing activity. According to him, gatherings of several hundred fishing boats have been observed before, but concentrations exceeding one thousand vessels are extremely rare.
Several maritime experts believe the vessels were unlikely to be engaged in fishing. Gregory Poling of the Center for Strategic and International Studies said he had never previously seen such a large concentration of Chinese fishing boats outside of ports.
Former naval officer Jennifer Parker described the manoeuvre as a demonstration with a clear military dimension. She noted that fishermen rarely operate in such tight formations and concentration, suggesting the vessels were involved in some form of organised exercise rather than fishing.
Security analysts say civilian vessels such as fishing boats play an important role in Chinese strategic planning. According to former United States Navy officer Thomas Shugart, civilian ships could be critical in any operation targeting Taiwan because China lacks sufficient amphibious landing craft for large-scale military transport.
Andrew Erickson of the United States Naval War College described the event as a “huge, precisely geo-coordinated flash mob.” Analysts say such activity could serve several purposes, including signalling, mobilisation drills or logistical training for future operations.
Experts believe many of the vessels involved could be part of China’s maritime militia, formally known as the People’s Armed Forces Maritime Militia. This paramilitary force consists of civilian mariners and vessels organised, trained and supported by the People's Liberation Army.
Often referred to as China’s “third sea force,” the maritime militia operates alongside the People's Liberation Army Navy and the China Coast Guard. While its members maintain civilian jobs in fishing and maritime industries, they can be mobilised to carry out missions that support China’s strategic objectives.
According to a report by the United States Department of Defense, Beijing subsidises commercial maritime organisations to operate vessels that can perform militia roles when required. These ships can assist in enforcing territorial claims or conducting grey-zone operations that fall below the threshold of open military conflict.
Analysts say such vessels could also play a key role in a potential blockade of Taiwan. A study by the Center for Strategic and International Studies suggests that maritime militia vessels could help divert or obstruct commercial shipping around the island, which would place severe pressure on Taiwan’s trade-dependent economy.
The recent large-scale formations of Chinese fishing boats therefore highlight the growing importance of civilian maritime assets in regional security dynamics across the East China Sea and the wider Indo-Pacific region.
