Located in the Hormozgan province, Nabio island has a surface area of 5.1 kilometres with its highest point standing 36 metres above the sea level.
The remains of ruined buildings and water wells on this Persian Gulf island testify to the presence of some settlements in the past. Its earlier inhabitants were allegedly involved in fishing and diving. By the early days of the World War II, the island inhabitants met their ends through pearl hunting. They used to hunt for a special pearl locally called Najva.
The flora of the region is mainly made up of Xerophyte and Halophyte. Nabio Island and its shores are home to various types of local and migratory birds due to their unique climate and geography.
The island is also considered to be one of the richest wildlife regions in Iran. A great number of wild birds inhabit in Nabio; to name eagles, parrots, white-eared bulbul, hoopoe, bee-eaters, laughing dove, and yellow wagtails . The government has established a protected area in this Persian Gulf island.