Kyara died Monday after battling "very serious and progressive health issues," the company says. SeaWorld ended its breeding program last year after significant backlash from animal rights activists.
The orca Takara gave birth to a calf Wednesday at the SeaWorld park in San Antonio, Texas. SeaWorld announced last year that it was ending its breeding program.
Tilikum was estimated to be 36 years old and had been in declining health for months. In 2010, he killed a SeaWorld trainer; a documentary about the incident led to outcry over orca captivity.
In an agreement with The Humane Society of the United States, the theme park will also phase out the use of the giant marine mammals in theatrical shows.
In 2010, Tilikum killed SeaWorld trainer Dawn Brancheau. Her death and SeaWorld's treatment of its orcas were at the center of the 2013 documentary Blackfish.
PETA says one of its supporters in California was actually a SeaWorld "agent" who infiltrated its activist network and tried to "incite illegal ... activity." SeaWorld has suspended the employee.
SeaWorld has be under fire for years, over its treatment of Orcas. A critical documentary suggested the treatment led to the death of a trainer in 2010.