Blackfish played on CNN recently so I set the PVR to see what everyone is talking about. Essentially, it explores how SeaWorld has exploited orcas for entertainment. Some reviews I've read expressed concern that it portrays orcas as frightening and that this takes away from the point of the documentary.
However, I feel that this was balanced well and it was clear that orcas should not be used as entertainment. They should not be forced to live their lives in aquariums.
After watching Blackfish, I'm left with an understanding of the bigger picture of animal exploitation and that I don't want any part of it. If you are 'into' documentaries, I highly recommend you check this out.
The official site: Blackfish and facebook page.