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US expert gives his view about
the SA algal bloom
September 2025
A US scientist invited to South Australia for his algal bloom expertise has advised the state
government that modified clay could be an effective small scale mitigation measure — but warned
there is no way to predict when the bloom will disappear.
Algal bloom expert Don Anderson - a senior scientist from Massachusetts - ad-dressed a meeting of
the state government’s algal bloom taskforce on Thursday.
The size of the toxic bloom off SA’s coast — responsible for widespread marine deaths and economic
disruption in the fishing and aquaculture industries — is now estimated to be about 4,500 square
kilometres.
Speaking at a press conference after the meeting, Dr Anderson said South Australia’s Karenia
mikimotoi bloom was “significant … but I would not call it exceptional”.
Asked how long it would take for South Australia’s bloom to disperse, Dr Anderson said: “It’s an
obvious question, and even the best experts in the world unfortunately can’t answer that.”
Greek Tribune
Adelaide, South Australia