This crazy photo from the Yomiuri Shimbun shows a diver swimming amongst a swarm of giant jellyfish. These giant sea blobs, known as Echizen kurage (Nomura's jellyfish), inflict heavy damage on Japanese fisheries in the Sea of Japan each year.
Baby jellies start out binding to a surface, like coral or rock and grow into a polyp tree where once it is mature enough, the small jellyfish detaches from the tree and grows and reproduces to start the cycle over again. Wicked stuff.
Lion’s Mane Jellyfish largest species of jellyfish in the world! It’s bell [main body] can be up to 8 feet in diameter, and those trailing tentacles can measure up to 120 feet! [that's longer than a blue whale!] These species are only found in the cold waters of the Artic and North Pacific/Atantic oceans. Because of their habitat, they rarely sting humans