Marie Holer

Marie Holer was the co-owner and operator of Marineland in Niagara Falls, Ontario, following the death of her husband, John Holer, in 2018. She continued to manage the park until her passing in 2024, during which time Marineland faced increasing scrutiny over its treatment of animals and the conditions within the park. Her death left the park's operations in a state of uncertainty, with ongoing debates about the welfare of its marine mammals.