Blackfish is a gripping documentary that examines the captivity of killer whales in marine parks, particularly focusing on the story of Tilikum, a captive orca responsible for the deaths of several trainers. Directed by Gabriela Cowperthwaite, the film explores the ethical implications of keeping these highly intelligent and social creatures in captivity, highlighting the physical and psychological impact it has on them. Through interviews with former trainers and experts, Blackfish challenges the popular perception of orcas in captivity and raises important questions about animal welfare.