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Pins, such as these one, have been placed on the reef, so that repetitive photos may be taken on an annual basis. These images are digitized, thus allowing researchers to measure the growth or regression of the corals, the amount of algae present, etc. Monitoring has shown that the reefs at the Flower Gardens are very healthy, with over 50% coral coverage in the study sites. (photo: Frank and Joyce Burek)

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