Chironex fleckeri, the infamous lethally venomous species of Box jellyfish living in northern Australia's coastal waters, is the most lethal jellyfish in the world, and one of the most dangerous animals in the world. The amount of venom in one animal is enough to kill 60 adult humans. First aid consists of washing the sting area with vinegar, and in no circumstance should alcohol, alcohol-based lotions, or methylated spirits be applied. Chironex fleckeri is best known for its incredibly powerful and often fatal sting. The sting produces excruciating pain accompanied by an intense burning sensation, and the venom has multiple effects attacking the nervous system, heart and skin at the same time. While an appreciable amount of venom (contact from about ten feet or three metres of tentacle) needs to be delivered in order to have a fatal effect on an adult human, the potently neurotoxic venom is extremely quick to act. Fatalities have been observed as little as four minutes after envenomation, notably quicker than any snake, insect or spider , and prompting its description as the world's deadliest venomous animal. Frequently a person swimming who gets stung will have a heart attack or drown before they can even get back to the shore or boat. Cardiopulmonary resuscitation (CPR) may be required. Medical help should be sought as soon as possible after considering these needs. Notorious for its dangerous sting, C. fleckeri tentacles, up to 3m long, are covered in thousands upon thousands of nematocysts which on contact release microscopic darts, each delivering an extremely powerful venom. Being stung invariably results in excruciating pain, and if the sting area is significant, an untreated victim may die in as little as 3 minutes. Swimmers who are stung face the additional risk of drowning. [READ THE REST OF THIS ARTICLE]
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