Documentaries purpose

To educate,

Convince,

Motivate

Educate: The documentary educates viewers by giving facts about how orcas are really supposed to be living and they say a tank is not a natural habitat.

Convince: Blackfish is trying to convince viewers that Seaworld is a terrible place and they never say anything good about Seaworld.

Motivate: Blackfish tries to motivate people to stop animal cruelty and evolve us out of using them for entertainment