Divers and the navy spent more than a week retrieving bodies, some from inside the boat, as outraged relatives waited for news.
"All missing found," the statement added, putting the final death toll at 47.
A minute's silence was held for the victims at a ceremony attended by the Chinese ambassador.
The Phoenix was among three vessels which ignored a bad weather warning against day trips to the islands around Phuket.
But it received little international attention compared to the dramatic rescue of 12 children and their football coach from a cave in northern Thailand.
The country last year received 35 million tourists of whom nearly 10 million were from China, government statistics show.
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