[2] The group consists of a number of islands arising from a carbonate platform 17 kilometres (11 miles) long and up to 10 kilometres (6.2 miles) wide, and also the outlying North Island, located 14 kilometres (8.7 miles) to the northwest of the main platform.
They are the most southerly well-established coral reef in the Indian Ocean.
[2] The group is part of the Houtman Abrolhos Important Bird Area, identified as such by BirdLife International because of its importance for supporting large numbers of breeding seabirds.
[4] The Wallabi Group is best known for the shipwreck of the Batavia on Morning Reef near Beacon Island in 1629,[5] and the subsequent mutiny and massacres that took place among the survivors.
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