Loggerhead turtle populations are facing a brighter future, but many other species are still in decline, while for others there are no data at all. AAP Image/Lauren Bath

We’ve only monitored a fraction of the Barrier Reef’s species

The Great Barrier Reef is home to some 1,600 species of bony fish, 130 sharks and rays, and turtles, mammals and more. Most have had no population monitoring, meaning we don’t know how well they are faring.

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