Like almost everybody said, I also really didn't get what this film really wanted to tell us.
Well, first of all, maybe it tells us how important and precsious nature is.
The bit nice looking varmint, seems to love nature and protects them, but suddently nature were being destroyed, and the other varmints living in the same environment, seemed very tired and scary. And then the jellyfish thing appears and helped the varmint? Well, to tell the truth, I didn't catch what that jellyfish thing was. Was that our future? Or just a kinda fantasy?
What I might know is that this film maybe wanted to tell us how important nature is, otherwise you will get sick or something like that.