What you can do about Captive Killer Whales and the way they are cruely treated is to spread as much awareness as possible via Twitter, Facebook, Instagram, or any other social media. You can also sign petitions to help wild Orcas and Captive Orcas such as a petition to help free a Captive Orca, or a petition to help the environment or conserve it to protect Wild Orcas. They are good petition sites such as http://www.Change.org
that website includes petitions to free Tilikum, Kiska, Lolita, and many others including Petitions to help save and protect Wild Orcas such as The Southern and Northern Residents Orcas.