Wolves and moose may have seemingly lovely, large enclosures, but these man-made habitats don't even come close to the hundreds of miles they would traverse in the wild. And aquariums - seeing dolphins and Orcas in tiny pools of shallow water just makes my heart constrict. What are these small tanks compared to the vast, diverse ocean? And the people working at these places are often so ignorant - spewing false "facts" to the public that management has told them to keep up public relations; ie. Orcas live for 25-30years in captivity, which is longer than their life in the wild would be. WRONG! Wild Orca bulls can live to be over 60, and cows often reach 100 years! And less than 1% of wild Orca dorsal fins flop over, despite being 6-8 feet tall, whereas in captivity, nearly 100% of bull Orca dorsals are flopped (there's debate over the cause, but it's thought to be a sign of poor health/depression, and diet).
And something I never thought about was HOW the animals got to the zoo or aquarium in the first place. Yes, many are born there - but where did their parents or grandparents come from? They were hunted, captured, ripped away from their own families, brought over continents, and thrown in with different animals to be a "family". This is wrong, plain and simple. How could anything like this be right or worth the pain, suffering, and trauma caused to the animals for the "betterment" or "education" of the human race? In no healthy world should this EVER be acceptable.
I highly urge you to watch the documentary on killer whales entitled Black Fish. I stumbled across it on Netflix, and it broke my heart and made me burn. They showed one of these hunts. There is no question whales are sentient, thinking, feeling creatures - they worked to trick the hunters in an effort to save their babies, but with advanced technology on the side of their enemy, there was no escape: mindless, merciless slaughter to get to the calves and rip them from their mothers, who wouldn't leave them and were CRYING out. We would never allow this savage hunting and kidnapping of other humans, so why is it forced upon other species just so we can go see the animal do silly tricks and splash us with water at a SeaWorld show?