A post-mortem examination is to be conducted, meaning the cause of death will most likely not be confirmed for a few weeks.
Her mother, Takara, was pregnant when SeaWorld announced that it would be ending its breeding program back in March of 2016. "From late evenings to early morning, no matter what, we devote our lives to these creatures, and this misfortune will be felt all through the whole SeaWorld family". They would hand feed her several times in a day so that she got enough nutrients and supplements.
The three-month-old killer whale calf, Kyara, had been receiving treatment for an infection thought to be pneumonia, but she succumbed to the illness on Monday, SeaWorld announced on its website.
Kyara's birth in April was hailed and highly publicized.
Several bodies found inside tractor-trailer in San Antonio
Owner Brian Pyle told The Washington Post that the Louisville, Kentucky-based driver owned the truck and was on his first trip. He later added that emergency workers used triage techniques to help people in what he called a "mass-casualty" event.
In an 840-word statement posted on its SeaWorldCares site, the Orlando-based company said Kyara was being treated for an infection.
It plans to phase out its reputed live orca performances by 2019, especially after scrutiny was intensified by the 2013 documentary "Blackfish".
People watch through glass as a killer whale swims by in a display tank at SeaWorld in San Diego. In January 2017, a 36-year-old whale Tilikum died in captivity at the park.
SeaWorld has not collected a wild orca in almost 40 years, and most of its orcas were born in captivity.
SeaWorld has 22 orcas left in the U.S. The youngest, Amaya, was born in December 2014.