Kiska, photographed at Marineland in 2013, who has been described as “the loneliest orca in the world,” has died at age 47.

Kiska, known as the world’s loneliest orca, has died at Marineland

Kiska, the last captive orca in Canada and the focus of multiple animal activist protests at Marineland, has died.

Kiska, the last captive orca in Canada and the focus of multiple animal activist protests at Marineland, has died.

The Niagara Falls theme park, which recently registered to lobby the government to discuss its potential sale, announced the death Friday.