captivity, n.All

Captivity is utterly destructive. When a captive lion steps out of his cage, he comes into a wider world than the lion who has known only the wilds. While he was in captivity, there were only two worlds for him - the world of the cage, and the world outside the cage. Now he is free. He roars. He attacks people. He eats them. Yet he is not satisfied, for there is no third world that is neither the world of the cage nor the world outside the cage.

Octopuses are so intelligent, biologists give them puzzles so they don't get bored when held in captivity.

Great white sharks do not survive in captivity due to depression and refusing to be fed by humans, leading them to die of starvation.

Captivity is the greatest of all evils that can befall one.