A rare phantom jellyfish has been spotted by scientists exploring the deep sea near Argentina. Stygiomedusa gigantea, more commonly known as the giant phantom jellyfish, was filmed 250 metres below the surface in the South Atlantic Ocean. Their four arms, which look like long pink ribbons, are not stinging tentacles. Instead the jellyfish use them to catch their prey of fish and plankton, according to the institute. The team also discovered 28 potential new species including corals, sea urchins, and sea anemones.