
1) Atoll of the Tuamotus
Found on
https://www.crosswordclues.com/clue/rangiroa

Rangiroa (meaning Vast Sky in Tuamotuan) or Te Kokōta (Hyades in Māori), is the largest atoll in the Tuamotus, and one of the largest in the world (although it is smaller than Kwajalein in the Marshall Islands and Huvadhu in the Maldives). It is part of the Palliser group. The nearest atoll is Tikehau, located only 12 km to the West. It is about...
Found on
http://en.wikipedia.org/wiki/Rangiroa

(from the article `French Polynesia`) ...has an area of 280 square miles and consists of some 80 islands. These are low, flat islands or atolls of coral origin, surrounding a lagoon. ...
Found on
http://www.britannica.com/eb/a-z/r/12

a huge 49-mile-long atoll located about 220 miles northeast of Tahiti; home to a large variety of sharks
Found on
http://www.pbs.org/kqed/oceanadventures/glossary/

See under Tahiti. Tahiti Small island (formerly Otaheite) in the South Pacific with about 1,000 square kilometres, which politically belongs to French Polynesia. Since 2004, a new autonomy statute has been in force, which gives the island great independence from France. About 350 kilometers northwest of Tahiti... Full text
Found on
https://glossary.wein.plus/rangiroa
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