By keeping the whales in captivity it is very cruel and they never get to see the ocean and they are stuck in a confined space for their whole life. They also are used for shows and hey do tricks and its not what the whales were made to do.
Sea world would say it was a trainer error
The whales are are sometimes starved if they dont do what they need to do, like doing a trick. When one whale does not do a trick right then all of the whales dont get food, so they all attack the whale that stopped them from getting their food.
The un-natural environment is causing un-natural consequences
Sometimes the whales can get aggressive, then they can take it out on other whales or their trainers. When they take it out on their trainers and then the trainers get hurt or they are killed. When the whales take it out on the other whales there is no place for them to escape.
They are taken from their families in a very disturbing way
When ever the whales would act out and attack the trainers, Sea World would say it was a trainer error. Some of the people at Sea World would say that it was the trainers fault that they have passed away, then they said that if that trainer was there they would say that it was their fault.
When these big animals are kept in such an un-natural environment they have some un-natural health consequences. These animals are supposed to be in the wild in big open space, but instead the are stuck in a bathtub sized area for their whole life. That then causes them to live for half of what they are supposed to.
When the whales are taken from the wild they are taken by trapping the young and keeping them separate from their families. When the whales get taken from the families the people who are taking them make sure hat they only take the babies so that then can grow up in captivity so they can do shows to amuse people.