The Hydra Spyder is an open-top amphibious sportscar which began production in 2006.
It is produced and marketed by Cool Amphibious Manufacturers International, LLC.
The vehicle can seat four people and has a 500 hp engine in the standard model making it strong enough to pull water skiers.
The company claims the vehicle is unsinkable as all cavities in its "hull" are packed with flotation foam.
On land, the 3,300 lb (1,500 kg) vehicle gets 16-18 miles per gallon, and can easily be fitted to take an ethanol mix instead of gasoline.