SeaWorld had the opportunity to allow Takara to give birth in a seaside sanctuary but instead chose to make a buck off the birth.
The company further noted that pneumonia is "one of the most common causes of morbidity and illness" in whales and dolphins - both in the wild and in captivity.
Kyara, a 3-month-old calf at SeaWorld San Antonio, died sometime Monday surrounded by staff at the park.
There are at least 40 killer whales, which have died under SeaWorld's watch. "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".
In a press release sent to Kens 5, SeaWorld said Kyara was being treated for the infection at the park's animal hospital for the past three days.
The Orlando-based company said Kyara likely had pneumonia, but officials can't confirm her cause of death until after a post-mortem is completed.
SeaWorld stated attention would now turn to Takara and providing care to the rest of the orca pod. That could take weeks.
"The global SeaWorld team is united in support of our San Antonio family as they go through this extremely hard time".
Tilikum, 35, became notorious for the deaths of three people during his time in captivity, featuring heavily in the £50,000, low-budget documentary "Blackfish" that went on to earn worldwide acclaim by highlighting the incredulity of keeping highly social, extremely intelligent whales in captivity. The company made the announcement a year ago that its current collection of orcas will be the final generation at SeaWorld.