Dolfinarium Harderwijk, better known as the Dolfinarium, is a marine mammal park in Harderwijk, the Netherlands. It is the largest marine mammal park in Europe.[4] Visitor numbers were steady from 2005 to 2011, numbering between 700,000 and 800,000, with only the opening of new attractions responsible for a surge in numbers.[2][5] In 2012 the Dolfinarium made €12 million in sales, which was around €2,4 million lower than the year before. This was mainly due to a decline in visitor numbers because of orca Morgan leaving the park, and the park temporarily closing down due to the start of construction at the end of the year.[6]