THOUSANDS of fish found dead in a Gold Coast river were killed by a lack of oxygen, tests have confirmed.
Locals were left shocked over the weekend after waking to find thousands of small bream and mullet floating in waterways around Benowa and Bundall.
Council yesterday received results back from a Griffith University test into the water, which showed the fish died when the water ”turned over” causing rising algae to diminish oxygen levels in the water body.
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“I’m advised cold water sinks during some cool weather periods and the muddy water and surrounds on the bottom of the water body then begin to rise,” Mayor Tom Tate said.
“This explains why the water looks so filthy.
“Algae rising through the water takes a lot of the oxygen and the fish die. It is never a nice sight to see dead fish or any marine life but it puts an end to the usual conspiracy theories of the greenies.”
Mayor Tate said Council would still wait for its own laboratory tests which would look at oxygen levels as well as bacteria and other conditions.
Those tests are due back by Friday.