Some fish larvae hatched with two heads last year at a Noosa hatchery.
The Australian Pesticides and Veterinary Medicines Authority says the State Government task force has excluded the farm chemical, endosulphan, from its investigations.
But aquaculture veterinarian Associate Professor, Matt Landos, says there is new evidence that endosulphan may be a factor.
"The early reports from the task force did not identify endosulphan in any residue testing and as such it was considered a less likely potential cause," he said.
"However, recent testing has identified the break-down product of endosulphan in the middle of Lake Cootharaba - in the middle of the Noosa system."
Chemical Spill Suspected In Abnormalities
AUSTRALIA - A member of the task force investigating fish abnormalities on Queensland's Sunshine Coast has contradicted claims that the farm chemical endosulphan has been ruled out.
