The jellyfish symbolism has a deep context. Same as its dwelling, the jellyfish spirit animal is profound. It has a depth that you can only discover if you meditate well with it.
The basic interpretation of this dream is a special necessity. Specifically, this creature is encouraging you to be easy on yourself. Furthermore, it wants you to become the person that you want to be. Same as its flashy appearance, it wants you to shine. It is one of the reasons why it appeared to your dream in the first place. Or, if not, any meaningful encounters with the creature is something that you should take heed.