The SmartFish aircraft is a concept vehicle created by an engineering firm in Germany, based on the aerodynamic shape of a fish. So far, they have only built a remote control version of the aircraft, and a prototype is in the works. The prototype will be built from kevlar and carbon fiber; but, the designers expect the vehicle to be relatively inexpensive to build.
The prototype is expected to be a ducted fan, two seater craft, capable of just under Mach 1. Still, that’s a respectable speed when you consider the top speed of other civilian aircraft in this size. Looking at the design though, I can’t help but think that is should be chrome with a robotic co-pilot.