Marathon swimmer Diana Nyad spent more than 40 hours in the shark-filled waters between Cuba and the Florida Keys, climbing into a boat only to be treated for searing welts left by Portuguese man o' war stings. Left swollen and red, Nyad had no choice but to end her trek early when medics warned another sting could be deadly.
The 62-year-old soldiered on for a time, cutting eye and mouth holes into a cap she wore over her face to protect against future stings. She surpassed 100,000 strokes, but the stings -- which team members said left what looked like branding marks from the jellyfishlike creatures' tentacles -- were too much of a risk.
"I trained this hard for this big dream I had for so many years, and to think these stupid little Portuguese man o' war take it down," Nyad said just hours after getting out of the water. "It's a huge disappointment."
She said she was in the best shape of her life but was blinded by the stings. Late Sunday morning, she heeded the warnings of experts who told her not to continue another two days.
"You go into convulsions, your spine feels paralyzed. I've had kidney stones. Nothing compares to the pain," Nyad said, wearing loose bandages and rehydrating with water and juice on her boat. "It just took the life force out of me."
Her team tentatively scheduled a news conference in Key West for this morning.
Nyad was making her second attempt in as many months at the Cuba-Florida crossing, a lifelong dream that she first tried as a 28-year-old back in 1978, when she swam inside a steel shark cage for about 42 hours before ending the attempt. A cageless attempt this August fell short 29 hours in, when, gasping for breath, Nyad threw in the towel after an eleventh-hour asthma attack she blamed on a bad reaction to a new medicine.
Australian swimmer Susie Maroney successfully swam the shark-filled waters from Cuba through the straits and to the Keys in 1997, though she used a cage. Nyad was trying to become the first to finish it without a cage.
The swimmer faced other obstacles aside from the man o' war stings. Saturday, handlers spotted barracudas in the area, and she got a visit from a curious Oceanic white-tipped shark that was shooed off by a support diver.
Without a cage to protect her, Nyad relied on equipment surrounding her with an electrical field that is harmless but deters most sharks. Her divers are there to gently discourage any who make it through. But not all encounters with marine life were unpleasant. Earlier in her journey, 10 pilot whales emerged in the distance ahead of the swimmer, according to one team tweet.
The Los Angeles woman regularly paused to rest and refuel on food that her assistants passed to her in the water. To maintain her strength she ate pasta, bananas, bite-size pieces of peanut butter sandwiches, and high-calorie and high-carbohydrate drinks.