I know this may start controversy but it's not oppressed if they don't know they're oppressed. But if being abused then let them free yes, but on the terms of being oppressed then no.
I believe that it is right to have animals in captivity under certain circumstances. Research institutions sometimes need to have captive animals because this allows them to learn more about them and their environment. This can help them protect other members of this species in the wild. However, when the purpose is entertainment, then I believe this is not justified. Nowadays, people have access to many wildlife documentaries and the internet, which gives them a great opportunity to learn about different animals without having to visit them in zoos and aquariums.
