June 13, 2013— -- Australian endurance swimmer Chloe McCardel aborted her attempted swim from Cuba to Florida after 11 hours in the water when she suffered "debilitating" jellyfish stings.

Had the latest attempt been successful, Nyad would have broken her own record of 102.5 miles (165 kilometers) for a cageless, open-sea swim, set in 1979 when she stroked from the Bahamas to Florida.