Chinese authorities have alleged that foreign intelligence agencies are deploying advanced surveillance technologies in the country’s surrounding waters, including sensors attached to marine animals, to gather sensitive oceanographic data.
In a statement released by China’s Ministry of State Security, officials warned that foreign actors are increasingly relying on unconventional methods to collect information related to China’s maritime environment and coastal defenses.
The ministry claimed that turtles and fish fitted with electronic sensors had been detected in Chinese waters. According to the statement, the animals were allegedly being used to collect environmental data such as water temperature, salinity levels, and ocean current information before transmitting the data abroad via satellite communications.
Chinese officials described these devices as part of a broader effort to conduct underwater intelligence gathering and create detailed maps of coastal areas.
Beyond the use of marine animals, the ministry also accused foreign organizations of deploying autonomous wave gliders powered by solar energy, sensor-equipped buoys, and monitoring systems installed on commercial vessels. These technologies were reportedly capable of collecting real-time information about maritime activities and port operations.
According to the ministry, the collected data could be used to develop detailed underwater mapping products and identify potential vulnerabilities within China’s coastal defense network, creating what it described as a national security risk.
Authorities urged organizations and individuals to conduct careful inspections of equipment originating from overseas sources and encouraged fishermen and maritime operators to report any suspicious devices encountered at sea.
Ongoing Espionage Disputes
The latest warning comes amid longstanding accusations of espionage exchanged between China and several Western governments.
Chinese security agencies have repeatedly warned of foreign intelligence operations targeting government personnel and critical infrastructure. In 2025, Beijing cautioned public officials about so-called “honeytrap” operations after reporting a case involving a government employee allegedly approached by a foreign intelligence operative.
Meanwhile, Western intelligence organizations have also accused China of conducting extensive espionage activities. Earlier this month, the Five Eyes intelligence alliance reported that Chinese operatives were allegedly posing as online recruiters in an effort to obtain sensitive information from targeted individuals.
The allegations highlight continuing tensions between China and Western countries over intelligence gathering, cybersecurity, and national security concerns.
