Concerns have been raised by dolphins' health in Gippsland Lakes, in Australia

Concerns have been raised about the health of the dolphins in the Gippsland Lakes.

Jeff Weir from the Dolphin Research Institute says many have developed lesions, which appear to be a result of a fungal infection.

At least nine have died in the last nine months.

He says it is still unclear what the cause is, but it could be linked to recent flooding in the area.
"It might be that when the saltwater regime settles down, it might be over the next few months it might be that this all settles down too," he said.

"But if it doesn't then we all need to be prepared and put a lot more field effort down there."