Robotic fish?
The pic above is from October of last year, when the University of Essex developed a self-guiding robot fish, and three of them were added to the London Aquarium More shots and even some video are to be found in the Essex Robotics gallery.
More recently, a far more artificial-looking, but nonetheless sophisticated robotic fish from Ryomei Engineering in Japan can be found here. (There's a video clip over there, too.)
Comments
we saw a robot car at the smithsonian. it looked like a landrover. the kids were VERY impressed.
j.