In short:

A bioluminescent algae that appears pinkish-red in the day and glows blue when disturbed has appeared across Tasmania's south-eastern coastline.

Dr Lisa-ann Gershwin, a biologist and world-leading expert on jellyfish, says the algae could be fatal for other sea life.

What's next?

Dr Gershwin predicts the algal bloom could lead to a spike in jellyfish populations across the state's south.