The Australian box jellyfish (Chironex fleckeri), is so poisonous that if one of its 6-foot-long (1.8-meter-long) tentacles ...

Of the many species of box jellyfish, eight are capable of causing death. Arguably the most venomous is the Chironex fleckeri (also known as the Australian box jellyfish) which can weigh up to 4 ...

There are around 45 species of box jellyfish and they include some of the deadliest venomous animals on Earth. They are also more active hunters than scyphozoans. The largest species, Chironex ...