Venomous Animals That Can Kill Humans

These animals have a high potent toxic that is able to kill humans, so be highly cautious if you ever meet one of these creatures.

These are just some of the animals that are able to kill humans with their venom. There are hundreds of other animals that can be deadly to humans, so beware of those and the animals below.


Stingrays belong to a group of fish called Dasyatidae, which includes rays, sharks and skates, and all have skeletons made of cartilage. Rays often lie on the seabed, where their flat shape and coloring make them difficult to see. Some rays are harmless, but others will quickly attack if stepped on or disturbed. Stingrays are found in tropical, warm waters around the world. They get their name from the sharp spines that grow near the base of their long, thin tails, in which both are very dangerous weapons. If an enemy gets too close, the stingray whips its tail around and drives its spine into its victim’s body. The spine is coated with poison and imposes a tremendously painful, though rarely fatal, wound. Several swimmers have died after being stung in the stomach or chest by stingrays. Stingray spines were once used by local people as weapons and sometimes unfortunately sold as letter openers to tourists.

Portuguese Man O’War (Physalia Physalis)

Also known as the Bluebottle, this “jellyfish” is actually a siphonophore, an organism that is made up of hundreds of small marine organisms, mainly polyps. They mainly live in warm oceans all around the world. Their tentacles can trail up to 165 feet behind their bodies, but average length is about 50 feet. Their powerful sting causes a sharp burning pain to humans, but the Man O’War is rarely fatal. Some side effects from the organism may include fever, shock, and circulatory and respiratory problems. Seek first aid quickly and to help neutralize the venom, pour vinegar over the area of the sting. In certain cases, an allergic reaction may occur and they may need medical treatment at a hospital to treat the side effects and pain. There have been deaths of humans from this species, so be careful next time you go to the beach.

Sea Wasp (Chironex Fleckeri)

Also known as the box jellyfish, they are one of the deadliest creatures in the world. They have a large transparent body shaped like a box, which can weigh as much as two kilograms. Under the large body, millions of stinging capsules cover the 120-inch transparent tentacles that are deadly to humans. These creatures mainly live in the Australian seas and as they move to creeks and rivers, many swimmers can be stung. Children who are stung die within minutes of being stung. Symptoms includes a shock in the heart, complete circulatory failure, and the respiratory system paralyzes. If these symptoms are not treated quickly, the victim can die in two or three minutes, even if they are an adult.

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23 Responses to “Venomous Animals That Can Kill Humans”
  1. Dominic Says...

    On July 1, 2008 at 12:27 pm

    the blue-ringed octopus looks creepy…though if i hadn’t read this article, i wud prbly do something stupid like touch it…then die 5 minutes later…lol…sort of…anyways, great article.

  2. Bill L Says...

    On July 1, 2008 at 2:12 pm

    Black Widow bites are rarely fatal for adult humans

  3. Dominic Says...

    On July 1, 2008 at 5:03 pm

    but black widows r creepy, so despite the truth, their rep deserves consideration (for being in the article)…

  4. may Says...

    On July 1, 2008 at 7:04 pm

    i didnt kno u like this sorta stuff puttin articles to give ppl creeps well good info so next time im gonna be careful at what i touch

  5. ken Says...

    On July 1, 2008 at 7:05 pm

    Iricongi jellyfish

  6. Classic Says...

    On July 4, 2008 at 3:15 pm

    I never knew that an octopus could bite anyone, let alone poison a human being. Creepy.

    The background data on the Portuguese Man O’War (Physalia Physalis) was pretty cool. I never knew that groups of organisms could take on the form of a jellyfish.

    Since you included the black widow, why not the brown recluse? It is the other of the only two poisonous spiders found in America.

  7. Classic Says...

    On July 4, 2008 at 3:17 pm


    I just realized that that blue-ringed octopus is found on some of the pacific islands.
    MY group of pacific islands has over 80 individual islands, and sits between three seas. im pretty sure one of those animals could float right by any day now..

    especially since there are some people that dive every day for coins from tourists… they could get hurt…
    or worse. my people DO eat octopus >.>

  8. tonisan60 Says...

    On August 14, 2008 at 3:42 pm

    A frog? are you serious?, my God we have a lot to learn about.
    The thing that always amezed me about venomous animals is their beauty and there bright colors.
    I didn’t know about the octopus either, my applauses again Fernando.

  9. smart Says...

    On April 6, 2009 at 8:48 pm

    I hate this report!!!

  10. yo Says...

    On April 6, 2009 at 8:52 pm

    you should put something about the iricanji jellyfish. Its soooooooooooooooooooooooooo much more deadle than these animals

  11. someone Says...

    On April 30, 2009 at 1:49 am

    i really really really hate EVERYTHING about Scorpions, they are really disgusting insect.

  12. mom Says...

    On June 15, 2009 at 10:41 am

    hi jack

  13. mom Says...

    On June 15, 2009 at 10:48 am

    im playing cool weg=bsite

  14. jasmar Says...

    On June 24, 2009 at 7:29 pm

    heeeelppppppp i had a blue bottle in my bedroom aaaaaaa help me please it will kill me

  15. rodgin(^_^) Says...

    On July 7, 2009 at 5:29 am

    ooooohhhh……i,m scared with that thing!!!
    but nice one!!

  16. Goldrush2000 Says...

    On August 11, 2009 at 5:47 pm

    very nice :) Wow we have most of them in australia ; )

  17. nullya Says...

    On January 13, 2010 at 7:02 pm

    im a expert at octopuses and the blue ringed octopus is very venomous it can kill you in seconds!!!!!

  18. no name Says...

    On January 13, 2010 at 7:10 pm

    the 2 picture ya thats not a octipus stupid! :-b

  19. narnarfart Says...

    On January 13, 2010 at 7:15 pm

    hi!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! U ROCK DUDE!!!!!!!!!!!!or dudet.:-) !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

  20. jake Says...

    On February 20, 2010 at 10:19 am

    i almost got killed by one of these

  21. mira Says...

    On June 7, 2010 at 2:06 am

    i am so afraid of that sea wasp..
    i promise to behave if we go to the beach.
    i hate all of that. maybe there are part of the nature and make our world beautiful to see,but they are all dangerous..

    cause they can kill human.

  22. I know where you live Says...

    On March 17, 2011 at 5:05 pm

    I think that you shoukd of included the platapus aaaaaaaaannnnnnnnddd yes it is a platapus

  23. Izzy Says...

    On March 31, 2011 at 11:13 pm

    Hey “smarty” pants…bluebottles cant kill you. I’ve gotten stung by bluebottles many,many times and, yes, it hurt like hell, but it did not kill me. There have been absolutely no recorded deaths from the sting of a blue bottle so you just got BURNED!!

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