A box jellyfish at the Two Oceans Aquarium in Cape Town. Box jellies, also called sea wasps and marine stingers, live primarily in coastal waters off northern Australia and throughout the Indo-Pacific. Their venom is considered to be among the most deadly in the world, containing toxins that attack the heart, nervous system, and skin cells
The smallest and deadliest kingslayer of them all is a tiny species of jellyfish found in temperate and tropical waters around the world, including Australia. It got its name, Common Kingslayer, when Robert King, a scientists who travelled to Queensland in 2002, died of Irukandji syndrome after being stung by the jellyfish.