Harrowing footage shows 'world's loneliest orca' circling its tank and thrashing water after surviving friends and kids

This harrowing footage shows a lonely killer whale circling its tank and thrashing water after surviving it friends -- and own offspring. Kiska, dubbed the 'world's loneliest orca', circled the perimeter and splashes water over walls of her isolated tank at MarineLand Park in Niagra Falls, Ontario, Canada. She is said to have been captured in Icelandic waters in 1979, and has been in captivity ever since. Kiska, who is approximately 45-years-old, has survived all of her tank mates and her five calves, activists claim. Researchers and activists believe her behaviour is a result of her damaged mental and physical health and wellbeing from prolonged captivity. MarineLand has had 26 orcas pass through its tanks since it opened in 1962 - with 20 of them dying there - the rest were traded or given away to other establishments. Despite being well known to be social animals that thrive in groups, Kiska remains isolated from any other animal, not even another orca. Former MarineLand employee-turned-activist Phil Demers, 44, who worked at the park for 12 years, said: "Kiska is MarineLand’s last surviving orca. "She was captured in 1979 in Icelandic waters and has been at MarineLand ever since. "Her mental and physical health are deteriorating and as seen in the video, she repeatedly swims around her pool in the exact same way, even stopping briefly in some shallow water to shake erratically. "Experts call it 'zoochosis'. Orcas are social animals and NEED to be with their families, or in the least with others of their own species. The footage was filmed in June 2022.