Barry Bland / Fried egg jelly fish (Cotylorhiza tuberculata) Mediterranean Sea.

Fred Bavendam / Egg-yolk Jellyfish (Phacellophora camtschatica), Saanich Inlet, British Columbia, Canada

Jeff Rotman / Fried egg jellyfish {Cotylorhiza tuberculata} in open ocean, Italy, Mediterranean

Jeff Rotman / Fried egg jellyfish {Cotylorhiza tuberculata} in open ocean, Italy, Mediterranean

Jeff Rotman / Stinging nematocysts on Fried egg jellyfish, Italy {Cotylorhiza tuberculata}

Joel Sartore / Photo Ark / Mediterranean jellyfish (Cotylorhiza tuberculata) underside portrait, Loro Parque's Aquarium, Tenerife. Captive.

Joel Sartore / Photo Ark / Mediterranean jellyfish (Cotylorhiza tuberculata) underside, portrait, Loro Parque's Aquarium, Tenerife. Captive.

Joel Sartore / Photo Ark / Three Mediterranean jellyfish (Cotylorhiza tuberculata) portrait, Loro Parque's Aquarium, Tenerife. Captive.

Shane Gross / Fried egg jellyfish (Phacellophora camtschatica), portrait, Vancouver Island, British Columbia, Canada, Pacific Ocean.

Shane Gross / Fried egg jellyfish (Phacellophora camtschatica) off Vancouver Island, Canada

Franco Banfi / Mediterranean jelly or fried egg jellyfish (Cotylorhiza tubercolata) Massa Lubrense, Punta Campanella Marine Protected Area, Costa Amalfitana, Italy, Tyrrhenian Sea, Mediterranean.

David Hall / Fried Egg Jellyfish (Phacellophora camtschatica) viewed from below; Browning Pass, Queen Charlotte Strait, British Columbia, Canada. September.