It is a small (15’6″) 350 Chev powered whitewater jet race boat. Whitewater usually implies rocks, and a cavefish is a small fish that don’t see too good, who spends it’s life in the dark going from rock to rock. It’s also a motorcycle gang on a LucasArts computer game. They are blind from living in a cave, hi-tech and navigate by following the fog dots in the center of the road. Bumpity-bumpity bump!