On March 17, SeaWorld’s killer whale Katina, a matriarch of her orca pond, suffered a tear to her dorsal fin, the organization stated in a blog post Saturday.

Katina has given birth to four calves fathered by Tilikum: Unna, Makaio, lkaika and Taku. Makiao was featured in the documentary Blackfish, which is a documentary that exposes SeaWorld mistreatment of their orcas. Lkaika was seen being taken away at an young age from Katina and sent to SeaWorld San Diego. She suffered for weeks from depression and never stopped crying for her calf.

Theme park officials said it is currently unclear how the 39-year-old female orca suffered the injury; though it’s believed the injury to the base of her dorsal fin was “[a] result of interactions with other members of the orca pod,” the blog reads.

However, SeaWorld officials were quick to point out that the tear was not due to the fact that orcas “are in captivity and have aggression issues.”

“This is a normal occurrence in killer whale pods,” the post reads. “Killer whales are a social and hierarchical species, so interacting with other members of the pod, even in an aggressive or antagonistic manner, is a natural behavior we’d expect to see.”  

SeaWorld is so quick on their feet to hide any proof that orcas in captivity are suffering. It is not natural behavior to be cramped in a small tank with hardly any room, so aggression issues will happen.

Katina was in a tank with five other orcas, but only three of them belong to her pod.  Acts of aggression is rarely seen in the wild among pods basically nonexistent, but the aggression of  large amount to Katina’s dorsal fin being ripped off is a repeated consequence when complex and intelligent wild creatures are forced in unnatural groups in small tanks.

Katina, is in a separate pool with two of her offspring, and is being treated with medical honey and cold-laser therapy to promote wound healing and prevent infection.