Seabreacher Y

You could even use this one to sneak into Sea World if you wanted to. The Seabreacher Y ($100,000) is a submarine built for two that looks exactly like an Orca whale and even breaches the surface of the water with a whale-like leap. The Seabreacher Y is a one of a kind adventure that goes 50 mph on the surface and 25 mph under water. [source]