A waterfront penthouse bigger than the average Mosman house is attracting plenty of interest after its launch on the property market last week.

The proposed plan by Mexican fast-food chain Guzman y Gomez to operate a 24-hour restaurant in Mosman has been met with strong opposition from residents.

Mosman's Daisy Thomas has won Australia’s first-ever Winter Youth Olympic medal in Big Air, claiming silver at the Winter Youth Olympic Games in South Korea.

Marine experts have advised swimmers to avoid early morning and dusk dips in Sydney Harbour following a shocking shark attack on an eastern suburbs woman.

"The water was full of blood and we could see the dorsal fin of the shark slashing through the water.”

Sydney actress Marcia Hathaway was fatally mauled in a terrifying shark attack at Middle Harbour in 1963.