TECH – Chinese researchers have unveiled an advanced underwater drone modelled after a jellyfish, designed for stealth missions in aquatic environments. Developed by the Northwestern Polytechnical University in Xi’an, the translucent robot measures approximately 120 mm in diameter, weighs 56 grams, and features an umbrella-like transparent body with tentacles—allowing it to appear nearly indistinguishable from real marine life when submerged.
Professor Tao Kai, who led the development, described the device as an “underwater phantom” that excels in low-power consumption, near-silent operation, and lifelike motion. The university states that due to its design and materials, the drone is uniquely equipped for deep-sea covert monitoring, ecosystem observation, and precise inspections of underwater infrastructure.
Constructed from a hydrogel-electrode material, the robot replicates jellyfish muscle contraction and reflexes via electrostatic hydraulic actuators embedded in the body. This bio-inspired mechanism enables smooth, flowing movement, minimal acoustic signature, and flexible adaptation in water. The combination of materials and actuation tech results in a machine optimized for operations in fragile or sensitive marine zones.
Beyond its physical design, the drone is equipped with artificial intelligence capabilities. Embedded sensors and cameras provide data on its surroundings, while learning algorithms enable object detection and autonomous movement. Its extremely compact size and near-transparent form make it suitable for extended missions where detection by marine life or external systems must be minimised.
Read More: Waterloo Researchers Develop Artificial Muscles for Soft Robots
Applications for this “ghost” drone span from environmental research to surveillance. In fragile coral reefs or deep-sea trenches, the device could monitor ecosystems without disturbing habitats. In underwater infrastructure, it could inspect pipelines or cables in confined spaces that traditional vehicles cannot reach. Its stealth attributes also raise questions about use in military or intelligence contexts, as capture or detection becomes more difficult.
Experts highlight that this development reflects China’s growing emphasis on bio-inspired robotics and autonomous under-water vehicles. According to commentary, the project illustrates a broader strategic push into low-visibility, high-mobility systems for both civilian and strategic applications. The ghost jellyfish drone stands out for merging biomimicry, advanced materials, and AI into a compact system ready for real-world deployment.
As the prototype moves toward further testing and potential field use, observers will track how well it performs under changing oceanic conditions, how maintenance and control are handled, and how its dual-purpose potential is managed in civilian versus defence scenarios.
