Hidden miles beneath the ocean’s surface lies a creature so elusive it’s been seen only 120 times in over a century—the giant phantom jelly. This otherworldly predator, with its massive 33-foot arms and glowing body, defies what we know about marine life. But it’s not just its size or ethereal glow that leaves scientists awestruck; its bizarre way of reproducing is unlike anything seen before. What makes this jellyfish so extraordinary, and why is it one of the hardest creatures on Earth to study?