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Kaoa ( Rarotongan: kāoa, literally meaning 'coral rock in the lagoon') is a term used in three atolls of the Cook Islands for small coral rocky outcrops that are the base for pearl farming. The three atolls, with their respective Kaoa areas, are:

  • Penrhyn (15.0 km²)
  • Manihiki (5.0 km²)
  • Rakahanga (1.6 km²)