Royal Caribbean Oasis of the Seas Cruise Reviews for Senior Cruises to Caribbean – Southern Royal Caribbean Oasis of the Seas Cruise Reviews for Family Cruises to Caribbean – Southern Royal Caribbean. Two hundred more people on Royal Caribbean’s Oasis of the Seas cruise ship have been sickened by a gastrointestinal illness, bringing the total to 475. Royal Caribbean on Thursday said 277 passengers. The 278-room Oasis Duna Hotel is…