TOPSHOT - This picture taken on October 16, 2024, shows surfers riding the waves on Maroubra Beach after authorities closed down two adjacent beaches in Sydney. Authorities were baffled earlier this week when thousands of black spheres -- sized between a golf ball and a tennis ball -- were found littering the shores of tourist haven Coogee Beach, that later identified as petroleum-based "tar balls", after chemical testing. (Photo by Saeed KHAN / AFP) (Photo by SAEED KHAN/AFP via Getty Images)