I just wanted to point out that Keto killed trainer Alexis Martinez in Loro Parque.  Also, serious attacks and "incidents" are reported from Kasatka, Ky, Orkid, Shouka, and Kanduke, and that is only a partial list looking at a public and incomplete site.  It appears many of these animals have "fought back" against their captivity.    Reference:  https://en.wikipedia.org/wiki/List_of_captive_orcas