Two-hundred-seventy-seven passengers and crew members aboard the Royal Caribbean's Oasis of the Seas cruise ship became sick with a gastrointestinal illness, according to the cruise line.

SOUTHAMPTON, ENGLAND - OCTOBER 15: The world's largest cruise ship 'Oasis of the Seas' arrives in Southampton Water on October 15, 2014 in Southampton, England. The £800 million Royal Caribbean cruise ship will dock into Southampton for a one day stay stop before departing for the US.

(Photo by Matt Cardy/Getty Images)