A team of researchers at Beihang University, working with colleagues at Imperial College London and Swiss Federal Laboratories for Materials Science and Technology, has developed a quadcopter drone that is capable of flying in the air and maneuvering underwater. It also has a suction cup for hitching a ride on a host. They describe their drone in the journal Science Robotics.
source https://www.lifetechnology.com/blogs/life-technology-technology-news/a-quadcopter-that-works-in-the-air-and-underwater-and-also-has-a-suction-cup-for-hitching-a-ride-on-a-host
