[Video] C-Ray underwater robot uses flexible fins for quiet, efficient movement

Video: C-Ray underwater robot uses flexible hyperbolic fins to create thrust through body-like waves. The video demonstrates its ability to swim like a ray, crawl across the seabed, jet forward, and slide through tight spaces. The undulating drive is shown to be quiet, energy-efficient, and less disruptive to the environment, making it suitable for long missions such as reef surveys, infrastructure inspection, and mine countermeasures.

Built by Pliant Energy Systems. Video taken on December 31, 2025.