Those who answered once must have never been there. As long as you buy a ticket to the Polar Museum, you can watch it.
As for how many times you can watch it, it depends on the number of times. arrangements in the museum. When I went there were two performances a day, so you can watch it twice, it would be great if you can go, I suggest you find one. good seat half an hour in advance, and go to the middle of the first row. During the performance there, I had the opportunity to have close contact with the belugas!! The one I went to was organized by the school.