The biomimetic robot that mimics organisms is the creation of a team at Nanyang Technological University.

"Nature’s design took millions of years to perfect," The Straits Times quoted zoologist Diong Cheong Hoong as saying. "We cannot copy it precisely, but we have definitely succeeded in getting the design right."

Three prototypes were produced over two years. The first and third are modelled on the stingray, with fins along the sides of the plastic-encased body.

The second prototype mimics the swimming motion of the knife fish, with fins along the bottom.

These fish were the most evolved swimming organisms and were the best candidates for the project, the researchers said.

Unlike machines that use propellers, the invention does not disturb the environment by kicking up sand or creating too much noise.

The team is currently exploring how to improve the robot’s energy efficiency.