box, Sting, Great Barrier Reef, predator, Horizontal, Cairns, Threaten, Tentacles, Marine, Jellyfish, Threat, Coral Sea, Stinger, Dangerous, Jamie Seymour, JCU, Venom, Pacific, deadly, Habitat, half underwater, Life Savers, Ocean, Nematocyst, pain, toxic, Venomous, GBR, Irukandji Jellyfish, Queensland, irukandji, Sea, Invertebrate, Stinging, Split Level, Coral Reefs, invertebrae, vinegar, Mission Beach, research, Invertebrates, Half and Half, Death, Box Jellyfish, Australia, Tropical, Underwater