Researchers at the School of Navigation of Northwestern Polytechnical University in Xi’an, central China, have developed soft-body submersibles designed to resemble and move like manta rays to monitor coral reefs.
Since 2006, the research and development team has been studying the swimming patterns of marine organisms to create prototypes for submersibles used in coral reef monitoring.
Recently, these submersibles have been utilized to monitor outbreaks of species such as the crown-of-thorns starfish in the South China Sea. These starfish pose a significant threat to coral reefs by feeding on them.
The team has developed smaller submersibles for marine education and shallow coral reef monitoring, while larger models are capable of deeper dives and longer durations to collect extensive data.
Concerns have arisen regarding the safety of these bionic submersibles in the ocean, specifically whether they might attract predators like sharks. Professor Cao Yong from Northwestern Polytechnical University addressed these concerns.
“Under normal circumstances, the operational environment of small submersibles is controlled,” explained Professor Cao. “The larger submersible has a wingspan of over 4 meters, and typically, sharks will not approach it. However, young whales might playfully interact with it, potentially causing damage. To mitigate this, we use sound to warn or drive them away.”
Professor Cao also highlighted issues with microorganisms: “An accumulation of microorganisms can affect the submersible’s navigation. We apply a layer of hydrogel on its surface to prevent such attachments.”
The development of these manta ray-inspired submersibles represents a significant advancement in marine technology, aiding in the protection and study of vulnerable coral reef ecosystems.
Reference(s):
China designs 'manta ray' submersible for coral reef monitoring
cgtn.com
