Argentine scientists film rare “giant phantom jelly” measuring about 11 meters in the South Atlantic

An Argentine-led deep-sea expedition has recorded rare footage of Stygiomedusa gigantea—the so-called giant phantom jellyfish—in waters off Argentina, offering an unusual look at a species seldom observed alive in its natural environment. The animal was filmed at around 250 meters depth by the remotely operated vehicle SuBastian during the “Vida en los extremos” campaign aboard the research vessel R/V Falkor (too), involving scientists from CONICET and the University of Buenos Aires (UBA).