China unveiled the BG-5 Golden Dragon, a lifelike autonomous robot fish designed to resemble a real golden dragon fish, capable of self-navigation in water tanks. Developed by Chinese researchers, the robot was demonstrated in a viral video showing it steering smoothly through aquatic environments without external control. The technology, revealed in September 2026, combines biomimicry with autonomous systems for potential use in sensitive monitoring tasks.
The BG-5 replicates the appearance and movement of its biological counterpart with high precision, using soft materials and undulating fin mechanisms to avoid detection. Its autonomous steering relies on internal sensors and AI-driven motion algorithms, allowing it to adjust direction and depth independently. While marketed for ecological observation, experts note its stealth capabilities could support covert operations, including surveillance in restricted or hostile waters. The robot’s ability to blend into natural settings reduces the risk of detection by both humans and aquatic life.
The BG-5 uses a series of interconnected servo actuators along its body to simulate the wave-like motion of a real fish’s tail and fins. These movements are guided by onboard gyroscopes and pressure sensors that maintain balance and respond to water currents. Unlike traditional underwater drones with propellers, this design minimizes noise and visual disruption, enhancing its stealth profile. Developers emphasize that the biomimetic approach allows longer operational endurance in delicate ecosystems.
Beyond surveillance, the robot fish holds promise for environmental monitoring, such as tracking water quality or observing marine life without disturbing natural behavior. Researchers suggest it could help detect illegal fishing or poaching activities in protected zones by blending into schools of real fish. Its non-intrusive nature makes it suitable for sensitive habitats where conventional equipment might cause stress or displacement. However, dual-use concerns remain, as the same stealth features valuable for conservation could also enable intelligence gathering.
What powers the BG-5 robot fish during operation? The robot is powered by an internal rechargeable lithium battery pack, enabling up to eight hours of continuous operation depending on speed and maneuvering demands.
Can the robot fish operate in saltwater environments? Yes, the BG-5 is designed for both freshwater and saltwater use, with corrosion-resistant materials sealing its internal components against marine conditions.
Is the robot fish remotely controlled or fully autonomous? It operates autonomously using pre-programmed routes and real-time sensor feedback, though it can also receive updated commands via acoustic signals when needed.