well, it's quite simple to answer, and that is that his semen is worth a lot of money. >> over the years tilikum has been one of the main breeding whales at seaworld. which is brilliant because they can inseminate way more female whales because they can get his sperm and freeze it and he's basically operating as a sperm bank. in a reputable breeding program, rule number one is you certainly would not breed an animal that has shown a history of aggression towards humans. imagine if you had a pit bull who had killed. that animal would have likely been put down. but in the entire seaworld collection, it's like 54% of the whales in seaworld's collection now have tilikum's genes.