A fanlisting is a place for all fans of a particular show, movie, actor/actress, singer, etc. to come together and build the biggest listing of people from all around the world who are fans of that subject.
(from TheFanlistings.org)

This particular fanlisting is for fans of the song Fish ~Silent Cruise~ from the anime series Ghost In The Shell: Stand Alone Complex. If you're one of them, feel free to join!