BlackFish did a good job of making Seaworld look bad, and I asked myself "is this the typical CNN chop piece, and is the truth someplace in the middle?" while watching it a couple months ago when it first aired. Now, rewatching it on Netflix, I still can't answer that, as like Rich pointed out, SeaWorld STILL hasn't responded to the allegations made in the documentary.
Where do we as humans draw the line? A: Animals are either here for us to use, or they aren't. B: Some animals have more "sentience" than others, or more "intelligence", and should be in a separate category, and treated accordinly C: Animals are all our equals, and we should just leave ALL of them alone.
If the case can be made that keeping Orca's in captivity is wrong, shouldn't the same be said for all the millions of horses kept in captivity? They are subject to the same breeding techniques as the whales, the same captivity in corrals, the same veterinarian procedures, the are separated from their young for breeding purposes, they are sometimes eaten, or sold to the glue factory, they are used in entertainment shows like rodeos, horses races, and hundreds of other things......