Here is another versatile underwater drone that lets you perform inspections under water. The Blueye Pioneer Underwater Drone has a full HD camera, LED lights, and a self-stabilizing design. You can interact with it from your smartphone/tablet or using goggles.
The Pioneer drone has a sped of 2 m/s and can explore at depths up to 150 m. The battery life lasts up to 2 hours. You can order yours for $3000 if you are early.