Kotor, Montenegro. As of 3rd November 2021, Aquarium Boka changes its working hours. New opening hours are Wednesday, Thursday and Friday from 10:00 to 16:00 PM, and Saturday and Sunday from 10:00 to 17:00 PM. On Mondays and Tuesdays, the aquarium is closed for maintenance. I’ll see you at the Aquarium Boka!