It is a substance many people take to achieve good gut health, commonly found in yogurt and fermented vegetables like kimchi and sauerkraut.
But marine researchers think probiotics could help corals grown in aquaculture fight off disease and make them more resilient to stress once planted on the Great Barrier Reef.
A project investigating the possibility comes at a time when reef restoration efforts to address Great Barrier Reef challenges such as salinity, runoff, fishing, and climate change are in the spotlight.
In March, surveys of the Great Barrier Reef confirmed the World Heritage site had suffered a mass bleaching event during summer, the fourth event of its kind since 2016.
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