Red Paper Lantern Jellyfishare found at depths of 450 to 1000 meters (1,475 to 3,280 ft) and can grow up to 10 or 15 cm (4 to 6 in) long not including 15 to 30 tentacles. As they squish themselves up to swim, the red stuff within the gelatinous bell crumples up and concertinas just like a real paper lantern!
Many deep sea creatures are attracted to this hydroid jellyfish, but not simply because it looks lovely. They actually move in! Possibly because because it looks so lovely. Not only have amphipods been found living on the Red Paper Lantern Jellyfish, but also male and female Sea Spiders carrying eggs and whole groups of other, tiny jellyfish.
Source:Real Monstrosities