How do jellyfish kill people?

Question

Also, how many species are dangerous?

Answer 1

Jellyfish have literally billions of microscopic "stinging cells" connected to their tentacles. When these tentacles stick to you, every stinging cell connected to you goes into your skin, turning itself inside out (like turning your sock inside out) and releasing their toxins directly into your tissue, muscle, and bloodstream. This is why you can die from jellyfish so much faster than other venomous creatures. Others' venom take longer to reach other parts of your body.

Answer 2

To think you will automatically die from a jelly fish sting is a myth.When stung by a jellyfish, first aid may be in order. Though most jellyfish stings are not deadly, other stings, such as those perpetrated by the box jellyfish (Chironex fleckeri) may be fatal. Serious stings may cause anaphylaxis and eventual paralysis, and hence people stung by jellyfish must get out of the water to avoid drowning. In these serious cases, advanced professional care must be sought. This care may include administration of an antivenom and other supportive care such as required to treat the symptoms of anaphylactic shock. The most serious threat that humans face from jellyfish is the sting of the Irukandji, which has the most potent and deadly poison of any known jellyfish species.

Most jellyfish have tentacles or oral arms coated with thousands of microscopic nematocysts; generally, each of these nematocyst has a "trigger" (cnidocil) paired with a capsule containing a coiled stinging filament, as well as barbs on the exterior. Upon contact, the filament will swiftly unwind, launch into the target, and inject toxins. It can then pull the victim into its mouth, if appropriate.

Although most jellyfish are not perniciously dangerous to humans, a few are highly toxic, such as Cyanea capillata. The recently discovered Carukia barnesi is also suspected of causing two deaths in Australia. Contrary to popular belief, the menacingly infamous Portuguese Man o' War (Physalia) is not actually a jellyfish, but a colony of hydrozoan polyps. Regardless of the acutal toxicity of the stings, many victims find them very painful, and some individuals may have severe allergies similar to bee stings.

Answer 3

Can Jellyfish Kill Humans

Answer 4

Most jellyfish have tentacles or oral arms coated with thousands of microscopic nematocysts; generally, each of these nematocyst has a "trigger" (cnidocil) paired with a capsule containing a coiled stinging filament, as well as barbs on the exterior. Upon contact, the filament will swiftly unwind, launch into the target, and inject toxins. It can then pull the victim into its mouth, if appropriate.

Although most jellyfish are not perniciously dangerous to humans, a few are highly toxic, such as Cyanea capillata. The recently discovered Carukia barnesi is also suspected of causing two deaths in Australia.

Answer 5

Most jellyfish have tentacles or oral arms coated with thousands of microscopic nematocysts; generally, each of these nematocyst has a "trigger" (cnidocil) paired with a capsule containing a coiled stinging filament, as well as barbs on the exterior. Upon contact, the filament will swiftly unwind, launch into the target, and inject toxins. Although most jellyfish are not perniciously dangerous to humans, a few are highly toxic, such as Cyanea capillata

Answer 6

I can't believe the answerers who are categorically saying they can't kill. That's like saying a wasp sting can't kill, or eating peanuts. While there is a very low possibility of them being lethal, there is always the possibility of death is someone has an allergic reaction to the sting and goes into anaphalactic shock. EDIT: The moon jellyfish keeper only tells half the story. A good analogy is the dragonfly; In the UK it had the move lethal poison of any animal. But it's sting can't penetrate human skin, so people don't normally die from it. HOWEVER If it stings on an open wound then its poison is lethal. The jellyfish is the same. 99.99999999% of the time it's fine, but to say it can't kill is giving people a false sense of security

Answer 7

Most jellyfish have tentacles or oral arms coated with thousands of microscopic nematocysts; generally, each of these nematocyst has a "trigger" (cnidocil) paired with a capsule containing a coiled stinging filament, as well as barbs on the exterior. Upon contact, the filament will swiftly unwind, launch into the target, and inject toxins. It can then pull the victim into its mouth, if appropriate.

Although most jellyfish are not perniciously dangerous to humans, a few are highly toxic, such as Cyanea capillata. The recently discovered Carukia barnesi is also suspected of causing two deaths in Australia. Contrary to popular belief, the menacingly infamous Portuguese Man o' War (Physalia) is not actually a jellyfish, but a colony of hydrozoan polyps. Regardless of the acutal toxicity of the stings, many victims find them very painful, and some individuals may have severe allergies similar to bee stings
When stung by a jellyfish, first aid may be in order. Though most jellyfish stings are not deadly, other stings, such as those perpetrated by the box jellyfish (Chironex fleckeri) may be fatal. Serious stings may cause anaphylaxis and eventual paralysis, and hence people stung by jellyfish must get out of the water to avoid drowning. In these serious cases, advanced professional care must be sought. This care may include administration of an antivenom and other supportive care such as required to treat the symptoms of anaphylactic shock. The most serious threat that humans face from jellyfish is the sting of the Irukandji, which has the most potent and deadly poison of any known jellyfish species.

There are three goals of first aid for uncomplicated jellyfish stings: prevent injury to rescuers, inactivate the nematocysts, and remove any tentacles stuck on the patient. To prevent injury to rescuers, barrier clothing should be worn. This protection may include anything from panty hose to wet suits to full-body sting-proof suits. Inactivating the nematocysts, or stinging cells, prevents further injection of venom into the patient.

Vinegar (3 to 10% acetic acid in water) should be applied for box jellyfish stings.[1][2] However, vinegar is not recommended for Portuguese Man o' War stings.[1] In the case of stings on or around the eyes, vinegar may be placed on a towel and dabbed around the eyes, but not in them. Salt water may also be used in case vinegar is not readily available.[1][3] Fresh water should not be used if the sting occurred in salt water, as a change in pH can cause the release of additional venom. Rubbing the wound, or using alcohol, spirits, ammonia, or urine will encourage the release of venom and should be avoided.[4]

Once deactivated, the stinging cells must be removed. This can be accomplished by picking off tentacles left on the body.[4] First aid providers should be careful to use gloves or another readily available barrier device to prevent personal injury, and to follow standard universal precautions. After large pieces of the jellyfish are removed, shaving cream may be applied to the area and a knife edge, safety razor, or credit card may be used to take away any remaining nematocysts.[5]

Beyond initial first aid, antihistamines such as diphenhydramine (Benadryl) may be used to control skin irritation (pruritus).

Answer 8

their sting injects a toxin into your bloodstream, which kills you. depending on the jellyfish, the effect it will have on the body varies. i heard on the discovery channel only 50% of people can even feel a jellyfish sting.

Answer 9

They sting them with their stingers (nematocysts).
The link below gives all the venomous and non-venomous jellyfish.

http://en.wikipedia.org/wiki/Jellyfish

Answer 10

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yeah if it you get attacked by like a frickin swarm they will tear you up otherwise no sorry