Meet the BW-Space: a smart drone you can use under water to capture videos of marine life. It combines with your iOS or Android device for easy target tracking. The BW Space has autonomous modes, automatic light adjustment, and a 4K UHD camera. The camera can rotate 45 degrees to see above and below the surface of the water. The battery life lasts up to 7 hours.
The BW Space can lock and automatically follow the target under water. It has a top speed of 2 m/s, max diving depth of 100 meters, and max operating range of 500 meters.[where to find it]