In the movie ¨Black Fish¨ if the whales didn´t perform a good show they were not fed. The whales would starve and be locked in a small container or cage.
If the whales didn´t eat or get treated good they would get aggressive and attack the less dominant one and there was no way out.
The whales that are females attack on the males and the male are stuck in the cage trying to save there selves, They killed each other.
In the movie the people at Sea World took the baby from the mom when it was only 4 years of age. the mom cried louder and louder and when the baby was gone she wouldn´t move. she hid in the corner of the tank and never came out.
The whales became aggressive, living up to their name ¨killer whale¨. they started killing trainers and other whales.