The bottom line is, no matter how well they're looked after - they shouldn't be there in the first place.
Stealing the animals from their families and open ocean homes in the first place is inexcusable. I watched Blackfish with an open mind, and can see the good that SeaWorld do, but that scene was heartbreaking.
And no - I'm not an expert, and I couldn't give a toss how said industry experts can justify the above.
What about discovering ill/injured animals from the wild?
Zoo theme parks are always going to be iffy from the viewpoint of the animals because there's a distinct difference in pure conservation (like most standard zoos) and animals for entertainment...
Now, any information from PETA should never be taken at face value (after all, they put down a lot of animals themselves), but zoos and places like SeaWorld do have a role to play in the future... Unfortunately it boils down to the question of how big an animal is too big to keep in a cage/tank that will never be able to recreate their real life habitat?
Every zoo can do more to help their own animals, the difference between London Zoo or Chessie back in the 90s to now is an astounding difference in terms of the sizes and qualities of the enclosures... But it's up to these places to keep up with the latest ideas and trends to ensure that they keep a relevancy that is pretty important for the future of a lot of animals...
I mean Giant Pandas are no longer considered endangered! That couldn't be done without a lot of zoos (and China's general support) assistance...
However, Mako, you do need to stop being so incredibly defensive about people's views of SeaWorld... They were caught out in their practices, which were not good, and still require improvement in a lot of cases... I'm not too shocked by the death of an animal younger than it's general lifespan because it could well be that it contracted something or had a defect since birth... Unless that information is released we can only speculate, but SeaWorld's history (and Blackfish) will mean that anything will be analysed quite closely...
It's up to SeaWorld to change the image themselves, they don't need rabid fanboys clutching at research straws for them...