The shark bit off her leg while snorkeling near a resort around 3 p.m., Wednesday, May 24, said The Royal Turks and Caicos Islands Police.
Police did not know what type of shark attacked the 22-year-old or what town or city in Connecticut she is from.
The woman was rushed to a hospital where she is listed in serious condition, police said.
The Turks and Caicos, a British territory, is a small group of islands in the Atlantic Ocean, southeast of the Bahamas.
This is a developing story. Check back to Daily Voice for updates.
Click here to follow Daily Voice Clifton Park and receive free news updates.