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'Heck of a light show' as glittering algae mass off coast of Tasmania

January 02, 2025

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The Guardian

Masses of glittering algae have returned to Tasmania's coastline in a spectacular bloom of bioluminescence that experts say is the largest seen in years.

- Petra Stock

'Heck of a light show' as glittering algae mass off coast of Tasmania

The phenomenon, known as "sea sparkles" or "red tide", was caused by masses of Noctiluca scintillans, a pink-coloured algae that experts say is beautiful to look at, but considered bad news for the environment.

Dr Lisa-ann Gershwin, a scientist and writer who runs tours of Tasmania's naturally glowing flora and fauna, said the current algal bloom throughout Storm Bay, south-east of Hobart, was on a "truly epic" scale.

The algae was "putting on a heck of a light show", she said. What looked like a "pink slick" during the day emitted a "mesmerising sparkle" after dark, turning the arc of each wavelet a luminous blue that stretched as far as the eye could see.

She said it was a "spiritual experience to see something so awe-inspiring".

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