Researchers from Nanyang Technological University (NTU) in Singapore and Waseda University in Japan have developed a “diving suit” for cyborg cockroaches, allowing the insects to survive and move underwater for nearly three hours. According to a study published in Nature Communications, the system uses a 3D-printed oxygen generator and a flexible, waterproof envelope to enable terrestrial insects to operate in submerged or oxygen-poor environments.
How the Cyborg Cockroach Diving System Works
The device transforms a Madagascar cockroach into a robotic platform. According to the researchers, the system relies on a flexible, waterproof envelope that protects the insect’s body without restricting its movement. Unlike humans, cockroaches breathe through spiracles—small openings on the abdomen—rather than a mouth or lungs.
To facilitate underwater respiration, the team connected small silicone tubes to these spiracles. These tubes lead to a miniature oxygen generator located at the rear of the suit. This generator produces oxygen through a chemical reaction between hydrogen peroxide and manganese dioxide, effectively acting as a scaled-down scuba tank.
Did you know? Cockroaches are chosen for these experiments because they are naturally robust, energy-efficient, and capable of navigating irregular, cluttered spaces that would stop a traditional miniature robot.
Operational Capabilities and Testing Results
During trials, the equipped cockroaches successfully navigated submerged basins and oxygen-depleted environments, such as closed tubes simulating pipes. The researchers reported that the insects maintained relatively natural behavior despite the added weight of the respiratory system and electronic components.
The “cyborg” aspect comes from electronic modules mounted on the insect’s back. These modules send low-level electrical stimulations to the antennae or the rear of the body to influence the cockroach’s direction. This allows human operators to steer the insect without replacing its biological locomotion with mechanical parts.
Comparison: Cyborg Insects vs. Traditional Microrobots
| Feature | Cyborg Cockroach | Standard Microrobot |
|---|---|---|
| Locomotion | Natural biological agility | Mechanically simulated |
| Energy Efficiency | High (biological) | Limited by battery size |
| Terrain Adaptability | Excellent in debris/pipes | Often limited by joint design |
Future Applications in Search and Rescue
The primary goal for this technology is intervention in zones too dangerous or narrow for humans. The researchers suggest these cyborgs could be deployed after earthquakes or building collapses to locate survivors and map cavities.
The addition of underwater capability expands this utility to inspecting flooded drains, submerged pipelines, and underground networks with low oxygen levels. To increase the utility of these missions, the team plans to integrate advanced navigation systems and sensors capable of detecting temperature, gas, and movement.
The ability to steer these insects via antenna stimulation is the key to making them viable tools rather than random explorers.
Experimental Limitations and Ethical Concerns
Despite the results, the technology remains experimental. The trials were conducted under controlled conditions with a small number of insects. According to the study, the system must still prove its reliability in turbid or contaminated water, and challenges remain regarding data transmission and the recovery of the insects after a mission.
The use of living animals with implants also raises ethical questions. The researchers noted that the respiratory connectors can be removed without injuring the insects, but they acknowledge that further development requires ongoing reflection on the conditions of use.
Frequently Asked Questions
How long can the cyborg cockroach stay underwater?
According to the NTU and Waseda University researchers, the insects can evolve underwater for nearly three hours.
How do the cockroaches breathe inside the suit?
Oxygen is produced via a chemical reaction between hydrogen peroxide and manganese dioxide and delivered to the insect’s spiracles through silicone tubes.
Are these robots fully automated?
No. They are bio-hybrids. The insect provides the movement, while electronic modules provide stimulations to influence the direction of travel.
Want to stay updated on bio-robotics?
Related reading
