Ayu or AYU may refer to:Ayu Ayu sweetfish, a species of smelt Ayu, a local name for the African manatee Ayu (singer) or Ayumi Hamasaki, Japanese singer Ayu Islands, a small archipelago in Indonesia Ayu, Dawei, a village in Burma Ayu language, a language of Nigeria Aiyura Airport, IATA code AYU