Sydney, Australia (AFP) – Hundreds of mysterious black tar-like balls have washed up on two popular Sydney beaches, prompting lifeguards to close the strands to swimmers.

“Mysterious, black, ball-shaped debris” began appearing on Coogee Beach on Tuesday afternoon the local mayor said, leaving flummoxed Australian authorities scrambling to find out what they might be, and where they may have come from.

Hundreds of golf-to-cricket-ball-sized spheres could be seen littering the coast, which is usually thronged with Sydneysiders and tourists.

Instead, a few seagulls wandered among the spheres, pecking and examining.

The balls were also spotted at nearby Gordon’s Bay, an aquatic reserve popular for snorkelling and fishing, which was also closed.

“At this stage, it is unknown what the material is,” Mayor Dylan Parker said in a social media post.

“However, they may be ‘tar balls’ which are formed when oil comes in to contact with debris and water, typically the result of oil spills or seepage.”

arb/ssy

© Agence France-Presse

Featured image credit: kjpargeter | Freepik

Image: World data visualisation, Earth
Image of the day: November 2025, the third warmest on recordFactsNews

Image of the day: November 2025, the third warmest on record

The November 2025 temperature map brings attention to a month that ranked as the third-warmest November on record, according to the Copernicus Climate Change Service…
Muser NewsDeskMuser NewsDeskDecember 10, 2025 Full article
Image
Denmark can meet nitrogen reduction targets with Green Tripartite Agreement, but challenges remainNews

Denmark can meet nitrogen reduction targets with Green Tripartite Agreement, but challenges remain

A recalculation of Denmark's nitrogen reduction targets, known as the second opinion, has provided a stronger foundation for environmental efforts, particularly regarding the country's aquatic…
Adrian AlexandreAdrian AlexandreSeptember 24, 2024 Full article
Satellite Imagery: Ahe Atoll, French Polynesia (16 August 2025)
Image of the day: Pearl farming patterns in Ahe Atoll lagoonNews

Image of the day: Pearl farming patterns in Ahe Atoll lagoon

Ahe Atoll, an associated commune of Manihi in the Tuamotu Archipelago – a chain of coral atolls in French Polynesia – lies 484 km from…
Muser NewsDeskMuser NewsDeskApril 3, 2026 Full article