The Lions Mane Jellyfish is the largest jellyfish in the world. They have been swimming in arctic waters since before the dinosaurs (over 650 million years ago) and are among some of the oldest surviving species in the world. The largest can come in at about 6 meters and has tentacles over 50 meters long. Pretty amazing when you think these things have been swimming around for so long. World Largest, Largest Jellyfish, The Ocean, Scubas Diving, Lion Mane, Sea, Mane Jellyfish, Jelly Fish, Animal
Lion's Mane Jellyfish (Cyanea capillata) – the largest known species of jellyfish. The largest recorded specimen found, washed up on the shore of Massachusetts Bay in 1870, had a bell (body) with a diameter of 7 feet 6 inches (2.29 m) and tentacles 120 feet (37 m) long.