The Lions Mane Jellyfish is the largest jellyfish in the world. They have been swimming in arctic waters since before dinosaurs (over 650 million years ago) and are among some of the oldest surviving species in the world.
The Lion's mane jellyfish can grow to a size of more than two meters in diameter. They have a powerful sting and will reel in their prey with their sticky tentacles. The jellyfish are mainly feed on zooplankton, small fish, ctenophores, and the moon jelly.
Lions 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.