The World’s Most Dangerous Spider

According to the Guinness Book of records, 2010, the world’s most venomous and therefore most dangerous spider is the Brazilian wandering spider which produces enough venom to kill two people at a go. Have you seen these deadly spiders? Watch out for it in Banana plantations.

While most spiders are harmless and won’t even bite, there are those that are dangerous and can easily cause death. Which one is the world’s most dangerous spider? Which spider is the deadliest of them all? Research reveals that the most poisonous spider and therefore the most dangerous is The Brazilian Wandering Spider also known as the Banana Spider.

These spiders are highly aggressive and venomous. They are widely distributed in forests in Central and South America, particularly Costa Rica, Argentina, Colombia, Venezuela, Peru, Bolivia, Brazil and Paraguay. They are large spiders that have a body size of up to 4.8 cm with a leg span of more than 15cm.

There venom contains a powerful neurotoxin called Phoneutria nigriventer toxin-3 (or simply PhTx3) that acts as a calcium channel blocker and inhibits glutamate release, calcium uptake, and glutamate release at synapses. When in large concentrations, the spiders’ deadly toxin can lead to one of the following: -

  1. Loss of muscle control
  2. Breathing problems resulting in asphyxiation
  3. Intense pain and inflammation
  4. Priapism (prolonged erection)
  5. Paralysis and even death

Could this be the world’s most dangerous spider? Whether it is the deadliest of all or not, there is a need to watch out for it in the jungle particularly inside banana plantations.

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33 Responses to “The World’s Most Dangerous Spider”
  1. Minister Marlene Says...

    On October 29, 2010 at 6:47 pm

    I will not ever go to a bannana plantation. When traveling to Jamaica I will steer clear. Thanks for the warning. Nasty creature.

  2. TwiKnight Says...

    On October 29, 2010 at 6:48 pm

    Fascinating write. Would think twice about letting it bite me, even if there is the slightest chance if not at all that it might turn me into Spiderman overnight… ;)

  3. BluSphere Says...

    On October 29, 2010 at 6:49 pm

    Scary. It looks like a camel spider (which actually isn’t 100% a spider). Great article.

    Best regards,

  4. LoveDoctor Says...

    On October 29, 2010 at 6:56 pm

    The Itsy Bitsy Spider climbed up the water sprout
    Down came the rain and washed the spider out
    Out came the sun and dried up all the rain
    So the Itsy Bitsy Spider Climbed Up the Spout Again.

    Great article and very scary spider. Hopefully, I won’t be out in the jungle and come across this one.

  5. Nykesha Alexandra Says...

    On October 29, 2010 at 7:20 pm

    This article is well written. Keep it up!s

  6. Phoenix Montoya Says...

    On October 29, 2010 at 7:36 pm

    Good thing we do not have this one :( Creepy spider. Then again my husband loves exotic animals. Maybe one day I’ll find this one on one of our aquariums. Better memorize its features. Good post, Jimmy.

  7. Raj the Tora Says...

    On October 29, 2010 at 7:59 pm

    Excellent post Jimmy. Both species (the arachnid and homo sapiens) are interested in banana plantation and therefore arises the conflict. Well laid out warnings.

  8. culprit pontiff Says...

    On October 29, 2010 at 8:36 pm

    luckily it is not present in my country. it looks huge and creapy.

  9. buenavida Says...

    On October 29, 2010 at 8:56 pm

    Well, better stay far away from banana plantations!! I hope this spider does not live in Europe!

  10. Starpisces Says...

    On October 29, 2010 at 9:24 pm

    wow, so dangerous, this spider can be killed immediately instead of taking the photo on it, oops, sorry, for not protecting animals but want to kill them, no choice, it may kill innocent people, especially those at the banana plantation, looking for bananas to eat.

    very informative and well written.

  11. Michal Dorcak Says...

    On October 29, 2010 at 9:26 pm

    Now you made my stomach spin like centrifuge. I hate spiders and am always in war with them. They make me wanna puke and if I see one, it does not have time to anything expet die. I guess that if I saw one of these biggies I would most likely jump on it.

  12. Anuradha Ramkumar Says...

    On October 29, 2010 at 11:05 pm

    Need to think twice or thrice before getting into a banana plantation. Sorry for the late comment, Silaho.

  13. GodsGrace Says...

    On October 29, 2010 at 11:23 pm

    Nice Work

  14. Nina Mason Says...

    On October 29, 2010 at 11:51 pm

    ooh it’s ugly! I hate spiders lol
    Interesting facts though.

  15. Noeal V Says...

    On October 30, 2010 at 12:53 am

    Nice Share Jimmy

  16. Jimmy Shilaho Says...

    On October 30, 2010 at 1:03 am

    Michal, everything seems to make you want to puke these days, are you pregnant? Thanks for all your comments buddies.

  17. Stanley Soman Says...

    On October 30, 2010 at 2:17 am

    Darn i think i got bit..

  18. researchanalyst Says...

    On October 30, 2010 at 3:11 am


  19. Rehoboth Says...

    On October 30, 2010 at 6:28 am

    $thanks for sharing$

  20. clandestinef Says...

    On October 30, 2010 at 7:15 am

    They look scary…

  21. yes me Says...

    On October 30, 2010 at 7:19 am

    Spiders are not all bad they do some jobs we can’t cheers


    On October 30, 2010 at 7:27 am

    I hate spiders but this is a great article.

  23. albert1jemi Says...

    On October 30, 2010 at 12:35 pm

    great information

  24. Mark Gordon Brown Says...

    On October 30, 2010 at 12:36 pm

    Not here in Canada.. thank heavens.

  25. SharifaMcFarlane Says...

    On October 30, 2010 at 9:43 pm

    @ Minister Marlene
    The spiders Jimmy is talking about are found in South and Central America.
    The banana spider in Jamaica is non-aggressive.
    If that bites you(and I have never heard of that happening) the bite might hurt but only for a short time.
    I grew up without a fear of snakes and spiders. Jamaican snakes aren’t poisonous and the spiders aren’t either. The banana spiders you wll see are big though, and so are the webs.
    Raj would enjoy taking pictures.

  26. suhail Says...

    On October 31, 2010 at 6:34 am

    it definitely is the meanest looking spider ! Very cool post ! It reminds me of the time when I was bit by a spider got all the cool strengths and what did i do ? end up with Marry Jane and ruined my financial and emotional life !

  27. N. Sun Says...

    On October 31, 2010 at 8:07 am

    great article!

  28. J M Lennox Says...

    On October 31, 2010 at 10:01 am

    I hate spiders. I don’t even know why I came to look at this. I don’t CARE which are the most dangerous. A spider is dead the moment I discover it. Thanks for the info all the same Jimmy. :-)

  29. Literary Princess Says...

    On November 1, 2010 at 6:32 am


  30. Scared Says...

    On December 7, 2010 at 9:54 pm

    Why did I click on this link? I should have forced myself not to. I’m going to be imagining this spider trying to kill me when I’m attempting to fall asleep tonite.

  31. tom Says...

    On January 22, 2011 at 4:58 am

    so if this spider did bite you , it could give you a hard – on ? might not be a bad thing .

  32. kyle dye Says...

    On January 24, 2011 at 10:27 am

    yu want sum spider man dick

  33. Arjunan Says...

    On March 9, 2011 at 10:03 pm

    Man Lose his virginity When it bites……..

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