Mystery stinking black balls of human poo and medicines are washing up on seashores

Stinking balls made up of cooking oil, human poo and Class A drugs have baffled experts as they have been spotted on Australian beaches.

These nasty globs of gunk are so rank they have shut down eight Sydney beaches including iconic Bondi, as they bobbed into shore.

Essentially ’fatburg’ nuggets, the masses are composed of human poo, cooking oil and drugs, as well as human hair, food waste and fatty acids.

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And while experts have determined what the gross black balls are made up of, they continue to scratch their heads over where they came from and why they continue to wash up on shores.

Lead investigator Associate Professor Jon Beves, from the University of NSW said: “I don’t know if it’s come from our local sewer system, or if it’s been discharged from a boat, or if it’s been washed from the sewers into the stormwater, or some other origin that we really don’t know.

“It seems they haven’t come from many different locations, they’re consistent with all coming from one location at one time.

“They smell absolutely disgusting, they smell worse than anything you’ve ever smelt.”

Initially suspected to be tar balls — petroleum blobs that collect debris as they travel through the ocean, UNSW professor William Alexander Donald said testing revealed “a different, more discussing , composition”.

Tests were carried out by Department of Climate Change, Environment, Energy and Water, and scientists from the University of NSW. They’re multi-fibre make-up suggests they originated from a source that releases mixed waste.

However tests haven’t been able to confirm their origin “due to the complex composition of the balls and the time they have spent in the water”.

Authorities say they are considering several possible causes, such as a shipping spill or wastewater outflow. It’s expected test results revealing the exact source of the balls will come in next week.

Authorities warned people to steer well clear of the revolting blobs when they first washed ashore on October 17.

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