Answer: China
Notes: China developed the underwater drone nicknamed the "ghost jellyfish". The drone is made of a soft hydrogel material, has a transparent body, and uses electrostatic hydraulic actuators to mimic the natural, silent movement of a real jellyfish. It is equipped with an AI chip and a micro-camera for real-time object identification and can operate with very low energy consumption. Its primary uses are for stealthy underwater reconnaissance, ecological monitoring, and observing marine life without causing disruption.
