The wet weather hammering Australia is causing all sorts of unusual sights but one that has had people stumped is the jellyfish-like blobs being found.
People have been taking to social media to share photos of the clear goo they've seen on trees and footpaths.
“Many people are experiencing a gel-like substance exuding from their Illawarra Flame Trees in the wet weather," explains Australian Institute of Botanical Science Chief Botanist Dr Brett Summerell.
"In some cases this is covering the footpath and forming large blobs on the tips of the trees."
Dan Robinson took this photo of the jellyfish-like sap.
But Dr Summerell says there is a good explanation for the occurence.
"Normally the tree produces this when their seed pods are attacked by insects as a means of protecting them but with so much water the trees are exuding them through the growing points and through any damage on the branches," he says.
"There are reports that the gel can be caustic and even lift the paint off cars so it is best to wash it off surfaces with a hose and not touch it with bare skin.
"It is likely that because it is so diluted that the current production is less likely to be this caustic – but better to be safe than sorry”.
An image shared to Reddit.