page_title: Chagos Archipelago
section_title: Crustaceans
hierarchical_section_title: Chagos Archipelago / Ecology / Crustaceans
caption_attribution_description: English: Coconut Crab - The Chagos Archipelago
context_page_description: The Chagos Archipelago or Chagos Islands are a group of seven atolls comprising more than 60 individual tropical islands in the Indian Ocean about 500 kilometres south of the Maldives archipelago. This chain of islands is the southernmost archipelago of the Chagos-Laccadive Ridge, a long submarine mountain range in the Indian Ocean.
  The Chagos was home to the Chagossians, a Bourbonnais Creole-speaking people, for more than a century and a half until the United Kingdom evicted them between 1967 and 1973 to allow the United States to build a military base on Diego Garcia, the largest of the Chagos Islands. Since 1971, only the atoll of Diego Garcia is inhabited, and only by military and civilian contracted personnel. Since being expelled, Chagossian natives have been prevented from returning to the islands.
  The sovereignty of the Chagos Archipelago is disputed between the United Kingdom and Mauritius. In 1965, three years before Mauritius gained independence, the United Kingdom excised the archipelago from Mauritius and the islands of Aldabra, Farquhar, and Desroches from the Seychelles to form the British Indian Ocean Territory.
context_section_description: The coconut crab (Birgus latro) is the world's largest terrestrial arthropod, reaching over one metre in leg span and 3.5-4 kilos in weight. As a juvenile it behaves like a hermit crab and uses empty coconut shells as protection, but as an adult this giant crab climbs trees and can crack through a coconut with its massive claws. Despite its wide global distribution, it is rare in most of the areas it is found. The coconut crabs on Chagos constitute one of the most undisturbed populations in the world. An important part of their biology is the long distances their young can travel as larvae. This means the Chagos coconut crabs are a vital source for replenishing other over-exploited populations in the Indian Ocean region.
caption: Coconut crabs are the world's largest terrestrial arthropod and live in one of the most undisturbed populations in the Chagos
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