The Aqua 2 underwater vehicle for research into underwater robotics, designed and built by Independent Robotics, available for purchase through Adept MobileRobots. Its six independently controlled fins give it excellent maneuverability with minimal disruption of the environment. It can even walk on land by attaching legs instead of fins.
Here it is being remotely controlled through a control panel by one of the divers.
For more information see http://mobilerobots.com/ResearchRobots/ResearchRobots/aqua2.aspx
