Biology Organisms Rare Giant Jellyfish Caught on Video Dr. M October 31, 2010 giantsjellyfishStygiomedusa Although first collected in 1901 and scientifically described in 1910, the giant jellyfish, Stygiomedusa gigantea, is rarely collected or seen. It is likely one of the largest invertebrate predators currently in… View More Rare Giant Jellyfish Caught on Video