Four people and two more from a Princess Cruises ship are missing after two sightseeing floatplanes collided near near Ketchikan, Alaska, on Monday.

The passengers were aboard planes booked through Princess Cruises shore excursions.  One plane was carrying 10 people from the Royal Princess, while the other plane was an independent excursion tour and carried four other passengers from Royal Princess.

A case of norovirus has been reported on the Marella Explorer 2.

Marella Explorer 2 is currently at the port of Olbia on the Italian island of Sardinia. A spokesperson for Tui, the parent company of Marella Cruises which operates the vessel, told The Telegraph that a small number of passengers began feeling unwell last week.

Instead of sending Independence of the Seas to cruise from Southampton in 2020, Royal Caribbean announced the ship will remain in Port Everglades.

As a result of the change, all 2020 sailings of Independence of the Seas from Southampton have been canceled.

The change was made to accommodate strong demand for the cruise line's private island of Perfect Day at Cococay.

Celebrity Cruises took delivery of Celebrity Flora, which is the cruise line's first cruise ship custom built for cruises to the Galapagos.

While docked in Rotterdam, Netherlands, Royal Caribbean Cruises Ltd.Chairman and CEO Richard Fain hosted a ceremony aboard Celebrity Flora. Cruise line and shipyard executives were also in attendance, in addition to crew members.

Royal Caribbean's Harmony of the Seas and Mariner of the Seas relocated to Port Canaveral this week to arrive at their new homeport.

The world's second-largest cruise ship, Harmony of the Seas, will offer 7-night Eastern and Western Caribbean sailings to the Caribbean and Perfect Day at CocoCay.

Carnival Corporation is being sued for doing business at properties the Cuban government seized in Cuba.

The lawsuit says Carnival is accused of touring to property confiscated by the Cuban government after the Fidel Castro-led revolution in 1959.

Jacksonville resident Javier Garcia-Bengochea and Kentucky-based Havana Docks Corp. both owned property in Cuba before it was seized. They're seeking damages from Carnival.

Princess Cruises announced today it will expand its MedallionClass Vacations to six additional ships in 2020, which will bring MedallionClass for the first time to Australia, New Zealand and even a world cruise.

These include:

Costa Cruises announced today that its new cruise ship will be called Costa Firenze and that it will be based in China.

The 135,500gt Costa Firenze, with capacity for more than 5,200 passengers, is under construction at Fincantieri's Marghera yard.

Royal Caribbean released new photos of its private island in The Bahamas that is newly upgraded and enhanced.

Perfect Day at CocoCay opened to guest over the weekend, which includes a number of new venues.  The $250 million transformation of Royal Caribbean's private island combines opportunities to relax, as well as new thrills.