
John Holer
John Holer was the founder of Marineland, a marine-themed amusement park in Niagara Falls, Ontario, which opened in 1961. Holer was instrumental in developing the park into a popular tourist destination featuring marine mammals and amusement rides. He led the park until his death in 2018, leaving a controversial legacy regarding animal welfare and the treatment of marine life in captivity.
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John Holer was the founder of Marineland.
Third Marineland beluga dies after being movedThe Globe and Mail·
Canada· 2026-09-18
Marineland’s founder John Holer died in 2018.
Marineland’s lack of resources create dangerous conditions for belugas, fired trainer saysThe Globe and Mail·
Canada· 2025-10-14



