Meet the Trident: an underwater drone that lets you record, stream, and share live video to your Android phone from 100m deep. It has a tough design and is small enough to fit in a backpack.
This robot sends live video to the surface over an ultra-thin kevlar-reinforced tether. It has a scratch-proof sapphire lens and rugged motors. Trident is open source and supports custom sensors and modules. It has max speed of 2m/h and can last 3-hour dives.