The World’s 5 Most Venomous Species

Mon, Jan 14, 2008

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There are hundreds of animals that could kill you.

box jellyfish
The box jellyfish

I don’t care if you’re a 98 pound weakling or a rippling wall of pure strength and power, you could still never take on a fairly significant percentage of the animal population without benefit of firearms. You could be mauled by a bear, eaten by a shark, or trampled by an elephant. I think the coolest deadly animals, however, are the venomous ones. Here’s our list of the top 5 most venomous creatures in the world.

5. The Stonefish

stonefish

The stonefish or dornorn is officially considered the most venomous fish in the world. It takes its name from the fact that, well, it looks like a stone. It can blend in well in the shallow tropical waters it inhabits, mostly in the Indian and Pacific oceans. The nasty part of the stonefish is on its dorsal fins. There is where you’ll find a row of spines filled with a toxic venom. If you have the bad luck to get stuck with one of those fins, you’ll find yourself in a world of hurt. The venom hurts so much that some people who’ve been stung have wanted the limb amputated. It can cause shock, paralysis, tissue death, and even fatalities if not treated within a few hours. The stonefish has at least one beneficial use. It’s a very expensive sashimi called okoze in Japan.

4. Blue-Ringed Octopi

octopus

There are three species of the blue-ringed octopus, all of which live in the Pacific. They’re all small, beautifully colored octopi, and they’re all some of the most venomous animals in the world. The octopus usually stays camoflauged, waiting to prey on its preferred dinner of small crabs and shrimp. Provoke it though, and it’ll quickly turn yellow and show off its bright blue markings. Then it will sting you and you’ll die. Ok, you might not die, but the tiny octopus carries enough venom to kill 26 adults in its body. The most dangerous effect of its venom is respiratory failure. If you’re stung by the octopus, you’re probably going to need rescue breathing until you can start to breathe on your own, which might not be for several hours. Nasty stuff.

3. Inland Taipan

inlandtaipan

The inland taipan’s nastiness can probably be inferred by its other name, the fierce snake. It’s the most poisonous snake in the world, with a single bite containing enough venom to kill up to 100 adults. Not only is it deadly, but it’s a quick killer too. It can kill you in less than 45 minutes. Fortunately for you, I doubt you spend too much time wandering the deserts of central Australia. Even more fortunately, there are no actual documented human fatalities. The snake is particularly timid, won’t bite if left alone, and there’s an antivenom. So wander around the Australian deserts with confidence, secure in the knowledge that only several dozen other animals might kill you.

2. Brazilian Wandering Spider

brazilian wandering spider

The Brazilian wandering spider is the most toxic spider in the world, more than earning its greek name of murderess. These spiders are really creepy for several reasons. One, it’s fierce. This is not some wimpy spider that will run away at the first sign of a human, allowing careless hikers to escape a painful death without even knowing they’re in danger. No, these spiders will attack anyone and anything they see as threatening. They’re both deadly and aggressive. Second, they’re not incredibly easy to avoid. They get the “wandering” part of their name from the fact that they roam around, rather than live in a particular web or tree. In densely populated areas, you can imagine how many people get bitten by an aggressive spider that wanders all over the place. They’re responsible for more cases of venom intoxication in Brazil than any other animals. Thankfully, even if the spider bites you it might not inject venom. Only about a third of it’s victims receive venomous bites. But if you do get any venom, you’re really going to regret it. It’s reportedly one of the most painful venoms in existence, thanks in large part to a high concentration of serotonin in the venom. While the venom is potentially fatal, the worst thing the Brazilian spider can cause would probably only make you die of embarrassment. The venom can cause priapism, an erection that won’t go away and might actually cause impotence. There is an antidote to the venom, but since it is so fast acting you’d better be carrying it on you if you’re out in the South American jungle. You’re not getting to a hospital in time.

1. The Box Jellyfish

box jellyfish

The box jellyfish or sea wasp is probably more dangerous than any of the other animals on this list. They’re not technically jellyfish, though they look a lot like them to me, but they are arguably the most venomous creature in the world. Tiny nematocysts on the animal’s tentacles contain the powerful venom and stick to their victims. Of all the creatures on this list that could sting me, I would fear this one the most. Its venom is so painful that there are several reports of people who passed out from the pain but kept screaming long after losing consciousness. They also kill more people per year, mostly in Australia, than any other animal on this list. Since records started being kept in 1884, it’s killed more than 5500 people. If you’re ever stung by one of these jellyfish, you’ll probably not be able to remember any tips. Here are a few anyway. Vinegar, due to its acetic acid content, will prevent any more venom from releasing into the bloodstream and should be applied to affected areas and any remaining tentacles immediately. If you can make it to the shore, not always a given when stung by one of these creatures, you might make it as there is an antivenom. Probably the best thing you can do to avoid stings, besides not swimming in box jellyfish infested waters of course, is to wear pantyhose. Seriously. A thin layer of nylon, such as pantyhose, will prevent the stingers from attaching to your skin and hurting like the dickens. Some men would think it girly to wear pantyhose at the beach, but if it’s good enough for Joe Namath I figure it’s good enough to save me from immense pain and death.

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This post was written by:

Chris - who has written 598 posts on Environmental Graffiti.

Chris (50% English, 50% Italian) is the evil overlord and creator of Environmental Graffiti. When he's not battling those pesky Jedi Knights, he can be found blogging about weird and wonderful environmental news. It's sort of becoming a full time job...he is quite surprised!

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57 Comments For This Post

Leave a Reply

  1. sir jorge Says:

    that’s why i don’t go swimming

  2. jamie Says:

    so if its not a jellyfish, what is it?

  3. the walnut Says:

    hmmm Australian animals anyone? ( well besides the spider). That’s why I won’t go to Australia or as I like to call it ” The Giant Isle of Death”, yeah yeah I know it’s a continent but I don’t care. Crocodiles? Box Jellyfish? Blue Ringed Octopi? Coastal and Inland Taipan? Etc? blech! That’s right Jason, I’m never coming to visit you on your wicked isle of deadly beasts

  4. Walrus Says:

    I had a Wandering Spider like pet and what can I say… well, was not a good idea. One day it escaped from my aquarium and I needed to be very careful walking in my house for more than one week until I found then (well, really was my friend that found the spider for me. She was going to use a shoe and started screaming when saw the spider inside the shoe)

  5. Wolfie Rankin Says:

    You missed the Funnel Web Spider.

  6. leemur Says:

    joe namath, panty hose? damn

  7. dan'l Says:

    Just an amusing note, octopus is Greek, not Latin, so the plural is not octopi but octopodes.

    I really enjoyed this.

  8. Anonymous Says:

    4 out of 5 are found in Australia

    I love my country <3

  9. Hyrum Says:

    So two of the six deadliest creatures are on land what is there to worry about?

  10. nate Says:

    It’s amazing to think that 60% of this list is made up of sea dwelling creatures. Maybe i’ll stick to the beach.

  11. Robert Says:

    i wish you hadn’t told me that. now i’m going to have to figure out a way to talk about more than one octopus today so i can work the word Octopodes into the conversation.

    Oh, and to Jamie, box jellyfish are cubozoa. They basically look like jellyfish but they have a cubical main body.

    I didn’t include the funnel web spider because the guiness book says the brazilian one is the most poisonous, although I wanted to because it was cool.

  12. Chris Says:

    Yeah I had to drag my ‘lifeguard’ girlfriend out of the sea once. She’d been washed down the beach with the current.

    Then, when we were knee deep in water, we got stung. She sat down in the water, of course.

    I took the big hit, in my leg. That venom travelled right up to my balls. MY BALLS MAN!!!! :(

  13. Charlie Says:

    What about the golden poison frog? (Phyllobates terribilis) I believe it has one of the most toxic poisons of any vertebrate, although it isn’t technically venomous. And dangerwise, it ranks pretty low…its only usual victims being monkeys and other small mammals that fall prey to the native South American Chaco Indians who dip their blowgun darts into the frog’s toxic skin.

  14. ckseminole Says:

    I thought the australian sea snake was the most venomous?

  15. Raguel Says:

    Agreed on two comments :
    1 – The Atrax Robustus (Funnel Web Spider) is the most venomous spider. Not the most dangerous (the wandering spider is more dangerous), but the most venomous, particularly because while many spiders usually “dry bite”, the Atrax almost always does a “wet bite”
    However, even if the Atrax’s venom detains the grim record of having killed a young boy in less than 15mn, it rarely causes death. I don’t think spiders should make it to this top 5
    2 – The australian sea snake IS the most venomous species

  16. Robert Says:

    the guiness book for 2007 says the brazilian wandering spider is the most venomous. That being said, i have no idea whether that means most potent venom or most venom by volume in a spider. it’s possible they’re both the most venomous but in different categories (toxicity vs. volume). Could be the same with the taipan versus the sea snake because I found several sources saying each was the most venomous.

  17. Tiger Tiger Says:

    Great article — I wouldn’t nickpick exactly what the “most poisonous” is because it’s not a single quantity and experts are going to disagree. Is it how many people are killed a year by an animal? Your probability of being killed if you’re stung? How toxic the venom is per unit weight?

    It’s just something to see how animals evolve to do amazing things in order to survive.

  18. mearon Says:

    The conotoxin of the conus geographus or cone snail is the most potent venom known to man.

  19. avi Says:

    errrr… is this in any particular order? reply to this comment

  20. matt Says:

    your chances of living through a venomous Brazilian wandering spider bite is much better than through the top 10 snake bites. Even the venomous bites. It’s just an agressive spider and it’s venom is very nasty, but not very deadly to adult humans.

  21. ? Says:

    the cone snail is the second most deadly animal

  22. jesus Says:

    I thing the the dart frog frog have be there vecause
    there venom is realy dengerus the can kill a lot of persons with his venom

  23. rah Says:

    wat bout
    stalker scorpion & dart frog

  24. reece Says:

    daddy long legs but they have no teeth to use it

  25. krishnan Says:

    australian sea snake may b poisonous but drop by drop inland taipan is the venomous snake.poisonous dart frogs r also very dangerous.but i think the list is abt most venomous creatures.venom differs from a poison .venom is dangerous only when it is injected.dart frogs are poisonous not venomous.u can correct me if iam wrong i will b glad correct my mistake. dangerous can b explained in many ways too…

  26. Cameron Says:

    NO I’d say 5. Box Jelyfish 4. Stonefish 3. Funnel web spider 2. Komodo Dragon and the most venomous hands down is the golden poison dart frog.

  27. Cameron Says:

    k wait 5. Box Jellyfish 4. Stonefish 3. Funnel Web Spider 2. Cone Snail and still 1. golden poison dart frog.

  28. Dave Says:

    The cone snail is more venomous than any of those and you didn’t list it.

  29. Dave Says:

    BTW Komodo Dragons are not venomous. Their mouths are full of deadly bacteria that will be very bad news if you were to get bit but not venom.

  30. jack Says:

    yeah, this is why i can hardly trust the web for hard facts, stop bickering and go read a book by someone who knows this stuff. but the one guy was right, poison has to be ingested, venom injected. you can actually drink venom and be ok.

  31. raja Says:

    ssssssssssssssssssssssuuuuuuuuuuuppppppppppppppppeeeeeeeeeeeeeeeeeerrrrrrrrrrrrr

  32. Darcy Says:

    walrus yer story is soooo funny

  33. Darcy Says:

    oh and i am aussie and i have never seen any of those creatures and funnel webs r only around sydney so u got everywere but sydney to live walnut

  34. Emma Says:

    Ew…
    but what about the daddy-long-legs spider, but it dosent have any fangs to bite…

    I dont think i’ll be in any rush to got to Oz now, but its useful to know abit about the deadly’s before i suppose
    =]

  35. M Adhithiyan Says:

    hi
    you missed the boomslang

  36. R Says:

    Bacterial toxins are by far the most potent of any known toxins. All other known toxins aren’t even close.

    http://www.textbookofbacteriology.net/proteintoxins.html

  37. birdies rok (tweet tweet! ima bird!) Says:

    i agree with the walnut!
    (except for the part about Jason, cuz i don’t really knoe a jason)

  38. Anthony Pike Says:

    This is so completely wrong, 1) the most venomous animal is actually the poison dart frog, it only takes 2micrograms of its venom to kill a human being which is about the amount of ink used to make a dot. The box jellyfish very rarely has enough venom to actually kill a human mainly only causes sickness and death only when not treated within a few hours. the box jellyfish is probably about 8th most venomous. 2) the inland taipan is the most posionous snake and although relatively calm and not prone to attack one bite contains around 100 micrograms of poison enough to kill 30 people. 3) The brazilian wandering spider is possibly fatal, the most deadly spider which is both agressive and highly venomous is the sydney funnel web spider a bite from this spider can kill within 15 minutes, a bite from the wandering spider would cause nausea and lungs to sieze but would take many hours if not treated.

    The List is more like:

    8 – Box Jellyfish
    7 – Marbled Cone Snail
    6 – Blue Ringed Octopus
    5 – Death Stalker Scorpion
    4 – Stonefish
    3 – Sydney Funnel Web Spider
    2 – Inland Taipan
    1 – Poison Dart Frog

  39. Anthony Pike Says:

    And people who think the daddy longlegs is poisonous it it just a myth. The crane-fly or what many people call a daddy longlegs is not actually poisonous at all. There is a similar spider the ‘long-legged cellar spider’ which is venomous and looks similar to a daddy longlegs which is how the myth appeared. Just thought id clear that up for people :)

  40. margarita Says:

    i almost scream

  41. Azkyroth Says:

    The inland taipan’s nastiness can probably be inferred by its other name, the fierce snake. It’s the most poisonous snake in the world, with a single bite containing enough venom to kill up to 100 adults. Not only is it deadly, but it’s a quick killer too. It can kill you in less than 45 minutes. Fortunately for you, I doubt you spend too much time wandering the deserts of central Australia. Even more fortunately, there are no actual documented human fatalities. The snake is particularly timid, won’t bite if left alone, and there’s an antivenom. So wander around the Australian deserts with confidence, secure in the knowledge that only several dozen other animals might kill you.

    I’m having a difficult time reconciling the two bolded portions. Explain?

  42. Azkyroth Says:

    And people who think the daddy longlegs is poisonous it it just a myth. The crane-fly or what many people call a daddy longlegs is not actually poisonous at all. There is a similar spider the ‘long-legged cellar spider’ which is venomous and looks similar to a daddy longlegs which is how the myth appeared. Just thought id clear that up for people :)

    The name “daddy-long-legs” is applied to three different groups of arthropods: the tipulidae, or crane flies (insects); the opiliones, also called harvestmen (arachnids, but not true spiders); and the pholcidae, also called cellar spiders (true spiders). Of these, with the possible exception of one or two opilione genuses, only the last are venomous, and the venom of pholcids is not dangerous to humans except, perhaps, the occasional person with a catastrophic allergic reaction. I’m not sure where the myth that the “daddy-longlegs” is the most poisonous creature in existence started, but whoever thought it up must still be snickering at people’s credulity.

  43. FatRalph Says:

    To people that are wondering – Poison Dart Frogs aren’t on here because they are not venomous – they are toxic/poisonous. Although they are the most toxic thing on earth. ;)

  44. kathy Says:

    hey how can u stay out from these deadliest animals?? Coney dod

  45. kathy Says:

    umm….ummm.. guys…guys… i’m scared. oh’ mally help. biology sol is this thursday. do u guys want to help me? i’m scared of these deadliest animals and sols. Coney dodo boney footki mishtey boto mondu kollah dooom doom (they mean in Hindi language that you guys are smart anc love me.

    thanks, Predator-Prey relationship is between a predator is a carnivorous animal that hunts, kills, and eats other animal in order to survive and prey is an animals caught, killed, and eaten by another animal as food. does that mean i could get eaten by an snake or what. chocolate vanilla strawberry blueberry love u bye

  46. vickyann Says:

    :] yea, what about the daddy-long-leg spider? I always herd that it was the most deadly spider in the world, but their fangs just couldnt bite throught the human skin? Is that true?

  47. tom Says:

    To the walnut: dude i live in Australia and actually the spider one is wrong the most deadly spider is the tree dwelling funnel web spider its venom is made to kill monkey like primates (eg. humans) even though there is no monkey’s in Australia so i guess we are “the giant isle of death” haha

  48. jason Says:

    i think its a great list there is some kind of dabate on animals in the comments section above me, so heres my contribution, why is the blue ring octopus beautiful but deadly?

  49. zaran Says:

    WELL….THE BOX JELLYFISH IS DEFINATELY THE MOST VENOMOUS CREATURE IN D WORLD AND THE POISON DART FROG IS D MOST POISONOUS ANIMAL IN D WORLD….THERE IS A DIFFERENCE BETWEEN POISONOUS AND VENOMOUS……..CHECK D INTERNET 4 MORE INFORMATION

  50. zaran Says:

    jason….THE ANSWER 2 UR QUESTION IZ THAT ITS BRIGHT BLUE RINGS R ITS WARNING SAYING”DONT DARE TOUCH ME”

  51. Callum Says:

    This site is inaccurate. It says that the Inland Taipan is the most venomous snake in the world, when actually the Sea Snake is.

  52. dhelzia Says:

    whatever they say

  53. Settsa Says:

    Venomous vs Poisonous.

    Atrax robustus is venomous but if you licked it (assuming it didnt envenomate you) you would be fine.

    Poison arrow frog is poisonous, if it bit you, you would be fine, if you licked it…you would be in serious trouble.

    Venomous organisms have a venom delivery system (like a fang) that is used to deliver a toxic compund into your blood stream and (usually) cause ion channels like calcium and pottasium to either shut down completley or open up completley (either one is really bad news).

    Furthermore..there are two kinds of Venomous Animals. Active and Passive. Activley Venomous animals envenomate their prey and often have fangs…think snakes.
    Passivley Venomous animals envenomate in defense and usually have spines..think stone fish.

    Comparisons of venomness (for lack of a better word) are usually conducted on Rats and Mice and are called LD50s.

    According to LD50s Box Jelly Fish (Chorinex flekeri) are without a doubt the MOST venomous animal in the Ocean and certainly the most Dangerous sea creature in Tropical AsutralAsia in Summer. BUT these LD50s are conducted on Rats…not too many Rats I know inhabit the Tropical Australian Ocean…..

    Atrax Robustus (Sydney Funnel Web)is “NOT” the most venomous spider according to LD50s on Rats, that nasty little Brazilian sucker is…

    but Atrax robustus IS the MOST venomous spider according to LD50s on PRIMATES (monkeys)….(hmmm a monkey eating spider in sydney???) It just so happens that Humans are primates so if one was to get approval from an ethics board to do some LD50s on humans…which do you think would win?

    Australian Snakes: The Inland Taipan is without a doubt the single most venomous snake on earth closely followed by Brown Snake and Coastal Taipan (mind you NO ONE has ever died from an Inland Taipan bite). These three snakes have a venom that will cause consumptive coagulapthy…which means it will use up all an animal’s Coagulation chemicals then all the blodd that isnt clotted will just drain out of every orifice…EVERY Orifice…but thats only in mammals (Just so happens Humans are mammals)

    But all these animals have venoms designed to “Kill” thier prey…Boring!! Whats really – really – really cool are wasps that paralyse their prey, take it home lay eggs on it…some weeks to months their larvae hatches and eats the prey item (usually a spider of catepillar) ALIVE!!!! This is where the story behind Alien comes from! But think about that…they keep the prey alive for extende periods of time…the prey has no food, no water, but stays alive….HOW DOES IT DO IT????? And if that wasn’t cool enough there are other wasps that will come along, find the spider with the 1st wasps larvae in it and wasp #2 will lay its egg INSIDE wasp egg #1!!!!! OH MY GOD…HOW UNREAL IS THAT!!!! If God was real he must have been one twisted individual to come up with that!

    Anyway sorry back to venoms…..extended paralysis is much harder and complicated to produce than death…

    But the real question that you guys should be asking is “Why” these animals are SO venomous??? Why does the Taipan need such an insane venom just to take out a couple of little rodent sized marsupials?
    Well the most popular theory is that Australia has a low prey density therefor the snake needs to make a guarantee kill. Also the foraging Ecology of Australian Elapid snakes is different from American Vipers….Vipers are ambush predators who sit and wait until something sweet and juicy walks past before they pounce, bite once and let go, then they track down their dying prey item…Elapid snakes are active predators who hunt down their cute and furries for dinner….bite and hold on until said prey is dead…..so there is some talk that the Aussie snakes need a stronger venom to kill the prey as soon as possible to reduce harm to themselves….

    But personally I dont agree with any of those theories…

  54. asha Says:

    what kind of jellyfish is it. I wander what it looks like?

  55. Andrew Says:

    Just an FYI, but the most venomous animal on the planet is the marbled cone snail. Yes…you heard right, a snail. It has the most complex, and deadliest venom of all animals.

  56. Murali Hegde Says:

    Where are the photos or pictures of The World’s 5 most venomous species? I’d like to see that. So, please show the pictures.

  57. ben. Says:

    okay, let’s get this straight. theres a difference between the most DEADLIEST animals and the animals that carry the most POTENT venom or poison. so far from watching years of animal planet and discovery channel and reading hours of worth of shit on the web i came up with this
    MOST POTENT VENOMS
    snake-inland taipan.
    spider-funnel web.
    sea dwelling-the cone snail
    THE MOST POISONESS ANIMAL IS THE DART FROG. THIS IS #1 OUT OF EVERYTHING.
    the eastern brown or aussi coast sea snake is second.
    the box jellyfish also has a very active and strong venom.
    it’s really hard to explain this. i recently saw something that this doctor took human cells put them in little vials and put drops of the most potent venom. if i remember correctly the box jelly fish venom killed 100% of the heart sells within 10 minutes.while i believe the taipan did around 60%/ sorry if it’s not that accurate.

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