Amboyna Cay or An Bang Island (Tagalog: Lagos; Chinese: 安波沙洲; pinyin: Anbo Shazhou;Vietnamese: Đảo An Bang; Malay: Pulau Amboyna Kecil) is an island in the Spratly Islands in the South China Sea. With an area of 1.6 hectares, it is the thirteenth largest Spratly island and the sixth largest among Vietnamese-occupied Spratly islands. It has two parts: east part consists of sand and coral, and west part is covered with guano. It has fringing reef. An obelisk, about 2.7 m high, stands on the SW corner. There is little vegetation. A lighthouse is operational since May 1995. It is described by some as heavily fortified.