I dream of big fishes? Meaning?

This may seem mean and I really mean it in a nice way. Have you been lying? like fish stories or tall tales. If so it may be your self conscious fearing of getting caught in a lie or a claim. the fish is the lie/story and you falling in is being caught in the lie. Once again I don't know you you may be the most honest person alive (or dead) so I can't tell if this would make sense.