Long long ago, I saw a 'fluffy' finned fish in a shallow stream at a Korean
tourist village. I don't know if the fish was 'installed' in the stream, but
to some degree, the stream was artificial. I think there were metallic
colors on the fins, else the fish wouldn't have visually struck me. It was
about 4 or 5" long.

Anyone have guesses or clues to its species?