Beijing warns of undersea espionage by sensor-equipped sea life

China’s security ministry claims foreign powers are waging an ‘undersea espionage’ campaign using sensor-equipped marine life—turtles, fish and other devices—plus buoys and wave gliders to gather oceanographic data and map its coastline, with real-time data beamed to satellites; officials warn such intelligence activities could threaten national security and are offering rewards (up to 500,000 yuan) for catching the spies, though there is no independent verification of the claims.