Okinotori Shima

Okinotori Island (沖ノ鳥島, Okinotori-shima), or Parece Vela, is a coral reef, geologically an atoll, with two rocks enlarged with tetrapod-cement structures. It is administered by Japan with a total shoal area of 8,482 m2 (2.10 acres) and land area 9.44 m2 (101.6 ft2). Its dry land area is mostly made up by three concrete encasings and there is a 100 by 50 m (330 by 160 ft) stilt platform in the lagoon housing a research station. There is a third completely artificial tetrapod-cement islet.

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