Corky, who is the same age as Anderson, was captured off the coast of British Colombia, Canada in 1969.
Working with vegan charity PETA, Anderson has written to new SeaWorld CEO Gustavo Antorcha saying Corky's 49 years in captivity have been 'full of confusion, pain, and death', asking him to make sure that he doesn't let the Orca 'die in a tank that, to her, is comparable to the size of a bathtub'.
There is a campaign running to free the Orca
"Kept almost constantly pregnant for a decade as part of a now-illegal captive-breeding program, she was inseminated seven times, six times by her own cousin, but none of her babies survived longer than 47 days. Her last baby was found floating at the bottom of her tank at SeaWorld," Anderson wrote.
"Corky's brother and sister are still alive and flourishing in the wild and a Canadian scientist who has been studying her family wants to bring her home.
"It's within your power to release this long-suffering orca to a seaside sanctuary in a protected bay of her home waters."
SeaWorld has not yet responded to Anderson's open letter.