The Department of Environment and Resource Management (DERM) says it will investigate what killed two turtles found north of Bundaberg on the south-east Queensland coast.
A mud crabber discovered the dead turtles and a dark mass of slick mucus two kilometres off Turkey Beach yesterday.
The crabber said he noticed a shine on top of the ocean which looked like an oil slick and discovered the dead turtles floating on the surface.
DERM has issued a statement saying it has taken samples of the water but weather conditions are hampering efforts to retrieve the turtles.
The discovery of dead marine life comes just four days after the Government lifted a net fishing ban in Gladstone Harbour after fish were diagnosed with red spot disease.
Source: ABC News