IS to the whale as the humming bird is to the Condor, and the mouse to the elephant, in their respective bulks. It is a small fish found in gravelly fresh-water streams in this island. The back is olive, the sides and belly either red, blue, or white, being of different colours in different individuals.
The dorsal fin consists of eight rays, the body is slender and about three inches long, the scales are small, even in proportion with the body; the tail bifid, and marked with a dusky spot. It is curious to see their evolutions by sun-shine, in a clear running stream, and their dartings at the fly that stalks in rapid eddies on the surface of the limpid current. They are the sprats of fresh water.