I really don't like zoos because the animals do often look sad and in limited space (I really prefer aquariums, those without dolphins), but at the same time: y

I really don't like zoos because the animals do often look sad and in limited space (I really prefer aquariums, those without dolphins), but at the same time: you have to remember the purpose of a zoo. Many of them take animals that are rescues, have serious injuries and many can't be returned to the wild. Some zoos have breeding programs and attempt breeding and release work. Some zoos even have endlings, the last of a species that can only survive (for now) in captivity. Most zoos are small and bad, but there are a few good ones that try to provide a good amount of space and comfortable living for animals. The San Diego Zoo, Cincinnati Zoo and Melbourne Zoo are all good examples.