Gelatin is a protein derived from collagen, a major component of animal connective tissue. Collagen can be extracted through boiling, drying, and grinding.  Gelatin has many uses, including in food, cosmetics, and pharmaceuticals.  Jellyfish are marine creatures that belong to the phylum Cnidaria. Some species of Jellyfish contain small amounts of collagen, but they are not a significant source of this protein.  Most commercial gelatin is made from the collagen of pigs or cows. Therefore, it is unlikely that jellyfish gelatin is used significantly in the food industry.