Paragraph 2
The location of the reef means it is in
condition. Most reefs are in
water, which makes them
to bleaching. Tahiti's reef is deep
to protect it from bleaching. UNESCO said the Tahiti reef is "one of the
extensive
coral reefs on record". It believes
of the deep
should be mapped. It said: "We know more about the
of the Moon or the surface of Mars than the
part of the ocean."