Because we fell in love with these fish, shouldn't we make an effort to conserve populations instead of capturing them and caging them taking away their ability to repopulate? Most of these reef fish are harvested in third world nations in the Pacific and Indian Oceans. The fishermen are willing to risk their lives for around $1USD and we buy the same fish for $60-something at a pet store.
We have to end the cycle, by ending the demand. If we care about things we don't need to own them, we should let them be free. It's not like you'd actually own a panda bear or a lion, even though you might like to.