Jellyfishes are the major non-polyp form of individuals of the phylum Cnidaria.
In the Real WorldEdit
In the Happy Feet franchiseEdit
In Happy Feet: The Videogame (GBA Version), they appear as enemies in water levels and in-game, you can also bounce at them.
In Happy Feet Two, they also appear as two giant orange jellyfishes and with their baby jellyfishes. They were first seen when Bill and Will are looking at them and reappear again in the end of the movie at "Under Pressure".