He manages the university's research station on Heron Island which studies the impact of climate change on the reef. "In the very early '40s the boat was bought by [Captain Christian] Poulsen ...

has found that green staghorn coral around Heron Island (part of the Great Barrier Reef) are more likely to survive warming water temperatures if hoof-clawed crabs live in the near vicinity.

Unsure what to expect, Sarah made the journey from Sydney to Heron Island and after an overnight stay, there was only 20kms to go. "I know no-one, and they put me in a room [at the Heron Island ...