I think that the best answer to this question is: Shark fin soup
. This is because making this soup will require the fishing for sharks, and the fishing for sharks has the potential for overfishing and will result in the possible disappearance of this species and possibly even some other related species.
Victor didn't like to be around other people on London because he didn't want people to find out what he was doing. Victor wanted that nobody knew about the creation of his new creature.
