The archipelago of the Andaman and Nicobar islands consists of 572 islands; 35 are known to be inhabited. These are home to five tribes. The Jarawas, Sentinelese and Onges are Negrito tribes. The Andamanese have ceased to be a tribe and a pure-blood Andamanese is a rarity. The remaining two are mongoloid tribes, the Nicobarese and the Shompen.