What does it mean if you dream about a tarantula giving birth to baby tarantula?

The tarantula is a metaphor for something you fear in reality. The dream means that your subconscious mind is trying to deal with the problem. The emotional tone of the dream, whether fearful, determined, shocked, etc., provides clues as to the exact meaning of the dream, along with the context and action: were you running from the tarantula? Chasing them? Stomping on them? Caging them? These are all illustrations of dealing with the problem.