% of shorelines covered by coral reefs

[Brice Quenoville]

Hi all,

I have a question that I guess does not have a straightforward answer but I
will be happy even by a very gross estimation.

Of the total amount of shorelines where coral reefs could be potentially
found (i.e. probably the total amount of shorelines found in tropical
areas), what is the percentage actually covered by coral reefs (in modern
times)?

Thank you very much,
brice

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