‘Cosmic’ bioluminescent algae lights up Melbourne’s St Kilda beach | Melbourne

Melbourne beach lovers were treated to the “cosmic and magical” view of bioluminescent algae off the beach of St Kilda this week.

Richard Pensak, marine biologist of the local environmental group Earthcare St Kilda, spotted the cloud of bright pink color in the water on Sunday and immediately knew what it was.

When he returned to water after nightfall, crowds had already gathered to see the show “really pretty and brilliant”.

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“It turns on people,” said Pensak.

Bioluminescent algae is a rare view but not unprecedented in the bay of Port Phillip. The natural phenomenon, called “sea spark” or “red tide”, is caused by an alga called Scintillans noctiluca: Beautiful to look but potentially irritating for fish due to high ammonia levels and reduction of oxygen levels in water.

Pensak has described to see the first -hand effect as a “bucket list”, while recognizing its reverse – that the extended beach of the seaweed is associated with the increase in temperatures in the ocean.

Ryan Abramowitz, a local author and illustrator, described the iridescent blue of wavy algae on the surface of the water as “impressive” and as “sparkling galaxies swirling and swirling through the shore”.

Visit the beach on Monday evening, he splashed in cold water in early spring to see the “superb rhythmic trails” of light.

“I go for the night swimming all the time, but it was certainly the cosmic and magical,” he said, “an exquisite that takes place for the first day of spring”.

Abramowitz said that he had already seen bioluminescent algae in Sydney and Bali, but never before in Melbourne.

Endowed for the first time in the port of Sydney in 1860, bioluminescent algae has become a much more common view of Australian waters since the 1990s, in particular in Sydney and Tasmania.

Professor Shauna Murray, algae expert and marine biologist at the Sydney University of Technology, said the species had proteins called Lucifrase which allowed him to shine at night.

The phenomenon is quite common along the Australian coasts, she said, and a natural part of the ecosystem, extending further south into Tasmania due to warming water off the Australian Eastern current.