Keibul Lamjao National Park is a national park in the Bishnupur district of the state of Manipur in India. It is 40 km² in area, the only floating park in the world, located in North East India, and an integral part of Loktak Lake. The national park is characterized by many floating decomposed plant materials locally called phumdis. To preserve the natural refuge of the endangered Manipur Eld's deer or brow-antlered deer (Cervus eldi eldi), or sangai also called the dancing deer, listed as an endangered species by IUCN. The park, which was initially declared to be a sanctuary in 1966, was subsequently declared to be a national park in 1977 through a gazette notification.