Woman Attempts To Swim From Florida To Cuba From News Fix: Chloe McCardel has swam English Channel six times, and she's completed two double-crosses, swimming from England to France and back again. But now she wants to do something that's never been done: swimming from Florida to Cuba, without a shark cage. That's right. An open swim from Key West to Havana, about 100 miles. It won't be an easy swim. In fact, it will be fraught with so many challenges. "Well, as you said, there are so many challenges, the shark fish, the jellyfish, even the Gulf Stream, which is really strong and often quite unpredictable," she said. "But I think the really hardest thing for me is probably going to be the jellyfish 'cause valiant attempts has come up against some really giant jellyfish."