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.
.~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~. @adeleburgess
Lion's Mane Jellyfish - Capable of attaining a bell diameter of 8.2 ft, these jellyfish can vary greatly in size. At 120 feet in length, the largest known specimen was longer than a blue whale and is considered one of the longest known animals in the world.