BEACHGOERS, lifesaving clubs and councils are united in demanding answers over the mass death of marine life littering local beaches.
They have welcomed a decision by the State Government, in the face of mounting public concern, to set up a taskforce of scientists to investigate the mass fish kill.
But they warn the findings must be acted upon to quell community concerns of a repeat event.
Seacliff Surf Life Saving president Andrew Chandler said he was eager to learn the outcome of the investigation.
"We need to know if it is a natural phenomenon or caused by humans to show us that we are not doing anything wrong as a community, or if it does come from pollution then this is something we must address," he said.
SIXTEEN dolphins have mysteriously washed up on beaches in the past month;
TWO penguins were found dead locally, one at Holdfast Shores and the other at Seacliff, and;
TENS of thousands of small fish as well as snapper, whiting, kingfish and mulloway were found washed up in the sands between Brighton and Marino.
Henley Surf Life Saving Club president Neville Fielder said the spate of dead marine life was the worst in his 40 years at the beach.
"We had a lot of dead carp wash up on the shore a few years ago but that was nothing like this," Mr Fielder said.
Christies Beach Surf Life Saving Club president Ron Harwood said clubs urgently needed to know what was causing the fish to die.
"If it's a water issue we have to take whatever steps are necessary to keep people out of the water," Mr Harwood said.
Recfish SA executive director Gary Flack said the carnage of marine life along Adelaide's coast was unprecedented.
"The main concern is that is that they (the deaths) are ranging across a mix of species from shallow water fish like yellow fin whiting to reef dwellers like snapper," Mr Flack said.
Brighton Tackle and Fish owner Pete Whiting said an investigation by an independent body was needed to reassure the public the desalination plant was not to blame.
"The talk is all about the desal plant, it doesn't mean it is the desal plant but we need an independent inquiry," Mr Whiting said.
Holdfast Bay Mayor Ken Rollond said he wanted to learn whether pollution and run-off from creeks, rivers, and drains could be a cause of algal blooms.
"The investigation is a worthwhile thing, we need independent scientists," he said.
Onkaparinga Mayor Lorraine Rosenberg said it was crucial to find out if the cause was natural.
"We need to know whether it is natural or not, because if it's not then we have to look at what mechanisms can be done to prevent it," Ms Rosenberg said.
Onkaparinga councillor and former Surf Life Saving SA president Bill Jamieson said: "We need to work out what's happening with it because it's a pretty special gulf and a lot of unique species live down our way."
Biosecurity SA manager of aquatic pests Vic Neverauskas said the fact most of the dead fish were small, shallow-water species coupled with signs of irritated and swollen gills suggested an algal bloom was to blame.
Algal blooms, believed to be caused by a hotter-than-usual March, deplete oxygen in the water and cause fish to die.
Fisheries Minister Gail Gago said testing of fish and water samples would be completed as soon as possible.
"To date, pathology tests show no evidence of disease, with evidence so far tending to suggest the predominantly juvenile fish that have died have been subjected to heat stress or lower oxygen levels consistent with algal blooms," Ms Gago said.
"(However) all findings will be made public."
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