$698 at Amazon.
The BladeFish SeaJet underwater scooter 5000 is perfect for scuba diving, snorkeling and swimming. The innovative, compact design of the Blade Fish sea scooter 5000 allows for high power and long run time while only weighing about 10lbs with dimensions of about 15″x15″x6″. But don’t let it’s small size fool you! The BladeFish can get up to 3.75 mph and has a run time up to 2 hours.