An additional 65 coronavirus cases have been confirmed aboard the quarantined Diamond Princess cruise ship docked in Yokohama, Japan, bringing the total to 135 – nearly doubling the previous total of 70 from Sunday, according to reports.

Ship Capt. Stefano Ravera stressed that the startling uptick does not mean the quarantine is not working, according to CNN.

“It was not unexpected, the additional cases, involving individuals exposed prior to the start of the quarantine,” he said.

Ravera revised the total, which he had earlier reported as 66.

“We have now been advised that the number of cases is reduced from 66 to 65, of which five were crew members,” he said Monday in a recording heard by the network.

Health officials have said the ship’s quarantine for the nearly 3,700 crew and passengers aboard will stretch to Feb. 19 unless something unexpected happens, Reuters reported.

Japan’s Chief Cabinet Secretary Yoshihide Suga told reporters Monday that there is “a limit capacity to process virus test samples,” adding that officials were testing samples belonging to those who had a fever, had close contact with infected people and those over the age of 80 who felt ill.

For some, the quarantine — which has lasted more than a week — could last even longer, with the World Health Organization saying late Sunday that the period could be extended “as appropriate” for close contacts of newly confirmed cases.

Many passengers spent their time savoring lavish meals, posting messages and photos on social media, while others paced the decks to get some fresh air.

Small groups are allowed out on deck every other day — with priority given to those whose cabins don’t have windows — but must wear masks and keep their distance from other people.

“We’re out in the bay, docked, so it’s kind of nice,” passenger Adam Waltz said in a video showing him and a companion walking on the deck Monday, sun flashing off the ocean.

“Another 10 minutes. We have a day off, then we’ll walk again,” he said.

Others watched the Oscars, which were broadcast live early Monday local time, after informal ballots were distributed to passengers.

Aun Na Tan watched the show on her cabin’s TV, saying it had been many years since she had watched the ceremony live.

“Normally it was on during our work time, but now we have plenty of time,” she told Reuters.

A 43-year-old Hong Kong resident quarantined with his wife, child and several other family members did the same.

“We were rooting for ‘Parasite’,” the man, who declined to give his name, told Reuters, referring to the South Korean film that took Best Picture and two other awards.

“We are doing origami; the ship is making instructional videos. We are doing some exercise,” he said.

Shipboard TV broadcasts also featured a magician — also under quarantine — performing tricks with red silk scarves.

“Princess stepping up its game with food service,” passenger Matthew Smith wrote online under a photo of plates of food, including what appeared to be mounds smoked salmon and hefty pieces of chocolate cake.

“You might have to drag me off the ship when the quarantine ends,” he quipped.