In the meantime, I’ll post a photo of a jellyfish I crocheted from plastic yarn recently (I’ve felt that I have the brains of a jellyfish when I get home from work lately). It is loosely modeled on Pelagia spp. jellyfish, and I created the yarn from newspaper wrappers that friends at work saved for me. I used the hyperbolic crochet technique for the tentacles, and a simple cap pattern for the bell. All parts were crocheted using a size L hook.
In case you were wondering what to do to keep those plastic bags your newspaper comes in from ending up as junk/food that will kill a turtle in the Gulf of Mexico, I offer this jellyfish, from Guadelupe Storm-Petrel. (I think this may be a Texas blogger.)