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The assembled experts told parliamentarians that fish able to graze on invading plants played a vital role in the health of reef ecosystems.
Because sea temperatures are now a lot higher, they are now reaching the thresholds at which coral get into distress
Professor Ove Hoegh-Guldberg
University of Queensland
"The Great Barrier Reef is still a resilient system... and herbivorous fish play a critical role in that regenerative capacity, by keeping the dead coral space free of algae, so that new juvenile coral can re-establish themselves," said Professor Terry Hughes from James Cook University in Townsville.