The planktonic scyphozoan Pacific sea nettle (Chrysaora fuscescens), Monterey Bay National Marine Sanctuary, California, United States of America, North America

The planktonic scyphozoan Pacific sea nettles (Chrysaora fuscescens), Monterey Bay National Marine Sanctuary, California, United States of America, North America

Scyphozoan jellyfish, Truk lagoon, Chuuk, Federated States of Micronesia, Caroline Islands, Micronesia, Pacific Ocean, Pacific

Scyphozoan jellyfish, Truk lagoon, Chuuk, Federated States of Micronesia, Caroline Islands, Micronesia, Pacific Ocean, Pacific

Jellyfish (Aurelia aurita), Spain, Europe

Moon Jelly, Moon Jellyfish, Common Jellyfish, or Saucer Jelly (Aurelia aurita), Black Sea, Crimea, Russia, Europe

Moon jellyfish (Aurelia aurita), Norwegian Sea, Northern Atlantic, Norway, Europe

Lion's mane jellyfish (Cyanea capillata), Norwegian Sea, Northern Atlantic, Norway, Europe

Dustbin-lid jellyfish (Rhizostoma pulmo) in shallow water, Catalonia, Spain, Europe

Jellyfish (Rhizostoma octopus) on the water surface, Catalonia, Spain, Europe

Jellyfish (Aurelia aurita), Spain, Europe

A group of fish eating an common jellyfish (Aurelia aurita), Amber Jack dive site, Destin, Panhandle, Gulf of Mexico, Florida, USA, North America

Jellyfish (Aurelia aurita), Spain, Europe

Mauve stinger (Pelagia noctiluca), in the Mediterranean Sea near Hyeres. Dive site Giens Peninsula, Cote dAzur, France, Europe