a third attempt at the Cuba-to-Florida swim, again without a shark cage, but had to stop after about 41 hours, about through the passage, because of jellyfish and Portuguese man-of-war stings and after currents pushed her off course. Nyad's October 2011 TED talk described how box jellyfish stings on her forearm and neck caused respiratory distress that eventually caused the swim to end. Fourth attempt On August 18, 2012, Nyad began her fourth attempt, without a protective shark cage. Nyad and her team ended the swim prematurely at 12:55 a.m. on August 21, 2012, reportedly because of two storms and nine jellyfish stings, after having covered more distance than her three previous attempts. Fifth attempt On the morning of August 31, 2013, Nyad began her fifth bid to swim from Havana, Cuba to Florida, a distance of about , accompanied by a 35-person support team, swimming without a shark cage but protected from jellyfish by a silicone mask, a full bodysuit, gloves and booties. At approximately 1:55 pm EDT on September 2, 2013, Nyad reached the beach in Key West, about 53 hours after she began her journey. While not directly questioning the authenticity of her story, some skeptics, including long-distance swimmers, requested the swim's GPS history, surface current, weather, and Nyad's eating and drinking data. The swim's published GPS data was analyzed and graphed on September 8 by The New York Times. After Nyad's September 10 response to questions and her publishing path data and notes from her navigator and two observers, a University of Miami oceanography professor, Tamay Ozgokmen, confirmed the navigator's assertion that favorable Gulf Stream currents explained Nyad's apparently incredible total velocity during certain portions of the swim. The New York Times public editor observed on September 19 that the focus had shifted from serious questions about possibly resting aboard a boat, to more technical issues relating to whether her crews' touching her while helping with her protective suit formally rendered the swim an "assisted" swim. Nyad had explained that wearing the jellyfish-protection suit was a life-and-death measure that for her superseded the previous "traditions" of the sport. On September 12, 2013, Nyad said she would "wait and see" if the swim would be officially ratified. As of 2022, the swim has not been ratified by any marathon swimming governing body. On September 10, 2013, Nyad appeared on The Ellen DeGeneres Show. She explained that she