Amazon.com : gladius Mini Underwater Drone, 4K UHD Underwater Camera for Real Time Viewing, Remote Controller and APP Remote Control, Dive to 330ft, Live Stream, Adjustable Tilt-Lock, Fish Finder, ROV : Electronics
Blue Robotics - Underwater ROVs, Thrusters, Sonars, and Cameras
Build Your Own Underwater ROV From Scratch : 8 Steps (with Pictures) - Instructables
DIY Raspberry Pi Powered Underwater Drone - Open Electronics - Open Electronics
The Seawolf is to Water as Camera Drones Are to Air | PetaPixel
I've designed a fully 3D printable underwater drone that's finally reliable, fast & maneuverable! Posted here a while back but now I'm thinking of releasing an entire DIY course on how to