Jellyfish are psychedelic looking creatures found in every ocean of the world. Most of them consist of an umbrella-shaped bell and tentacles which trail out, and do not have a respiratory system since their skin is thin enough to adsorb oxygen.
Close up of a jellyfish (age fotostock/Robert Harding)
Jellyfish at Peace Haven, Port Pegasus, Stewart Island, South Pacific Ocean (age fotostock/Robert Harding)
Snorkeler in Jellyfish Lake, Palau, Micronesia (Arco Images/Robert Harding)
Blue Bottle Jellyfish (age fotostock/Robert Harding)
Mastigias Jellyfish, Jellyfish Lake, Micronesia, Palau (age fotostock/Robert Harding)
Luminescent jellyfish, France, Mediterranean (Reinhard Dirscherl/Robert Harding)
Drifting Jellyfish, Indonesia, Wakatobi Dive Resort, Sulawesi, Indian Ocean (Reinhard Dirscherl/Robert Harding)
Compass Jellyfish, South Africa, Port Elizabeth, Indian Ocean (Reinhard Dirscherl/Robert Harding)
Crown jellyfish, Egypt, Red Sea, (Reinhard Dirscherl/Robert Harding)
Jellyfish and scuba diver, Norway, Atlantic Ocean (Reinhard Dirscherl/Robert Harding)
Jellyfish, Oceanographic Institute, Monaco-Veille, Monaco, Europe (Ethel Davies/Robert Harding)
See more photos of jellyfish here