The 11 Most Venomous Animals In The World Ranked By How Quickly They Kill You

When taking a relaxing walk on the beach, the last thing you want to step on is an animal that will kill you within minutes. But the most venomus animals in the world might do just that. Whether they live in land or sea, a handful of creatures around the world (mostly in Australia) can take your life incredibly quickly. From fish to snakes, there's always something that will take you out just minutes after you realize there's something there at all. How fast can animal venom kill? That depends. Whether you can survive venomous animal attacks depends on how quickly you get care. 

You might be wondering what the common symptoms are when you get stung or bitten by one of these creatures. It usually starts with numbness, then muscle paralysis, eventually followed by either respiratory failure or cardiac arrest. How long that takes depends on the creature, but depending on your luck it could take as long as a few hours... or as little as five minutes. Curious what to expect from the most venomous creatures in the world? Note that these animals are not 'poisonous', but venomous. Poison only kills you if you eat it. Check out our list below so you can be prepared.

  • Box Jellyfish
    Photo: MMWI Photographer / Shutterstock

    How Quickly You'll Die: Under 5 minutes

    Believed to be the most toxic animal in the sea, the box jellyfish is just about the worst animal you can come across on this list. While most species of box jellyfish aren't actually lethal to humans, the ones that are can take you out in no time. You'll become paralyzed, your heart will stop, and chances are that will all happen while you're underwater. Most of these creatures are found off the coast of Australia.

  • Poison Dart Frog
    Photo: Dirk Ercken / Shutterstock

    How Quickly You'll Die: 5 minutes

    This 2-inch frog from South America contains enough toxin to kill 10 people. The skin secretions are so potent, Colombian tribes have used it to tip their blowgun darts, which is where the name originated. The interesting thing about these guys is they're not naturally toxic, since those raised away from the jungle never develop toxicity. It's been speculated that they pick up various toxins from plants in their habitat. 

  • Australian Funnel-Web Spider
    Photo: Ken Griffiths / Shutterstock

    Australian Funnel-Web Spider

    How Quickly You'll Die: 5-15 minutes

    Like most animals in the world, the nastiest spiders can be found in Australia. The Australian funnel-web spider is responsible for more than a dozen reported deaths, all within 15 minutes of the initial bite. It's widely believed that if the spider bites you in the torso, you're done for. In one reported case, a woman bitten in the neck died within five minutes.

  • Blue-Ringed Octopus
    Photo: kaschibo / Shutterstock

    Blue-Ringed Octopus

    How Quickly You'll Die: Under 10 minutes

    When one of these creatures bites you, you probably won't notice it right away. Within minutes, though, your body will start to go numb and you'll have difficulty breathing. Before you know it, you'll be vomiting before you experience a full respiratory failure. Your heart will keep beating right up until the point it runs out of oxygen. Luckily, some people manage to survive longer than 10 minutes, but even then your only hope is to go on a ventilator before you're completely paralyzed. What makes this creature even more terrifying is it holds enough venom to do damage in bulk - it can kill up to 26 adults at once. So next time you're swimming in the Indian Ocean or the Pacific Ocean - specifically near Australia or Japan - look out for these little guys.

  • Puffer Fish
    Photo: Moize Nicolas / Shutterstock

    Puffer Fish

    How Quickly You'll Die: Anywhere from 20 minutes to 24 hours

    It may look kinda cute, but this inflatable nightmare fish carries an incredibly potent toxin called tetrodotoxin. Deadly to humans, tetrodotoxin is 1,200 times more toxic than cyanide. Once you're hit, the toxin will start paralyzing all your muscles, including those in the respiratory system. It then causes brain damage, effectively making you a zombie before ending your life. And if you're wondering, there's no cure. These fish are usually found in the waters of South America, Africa, and Southeast Asia. 

    The craziest part of all? You can actually eat puffer fish in Japanese restaurants. At your own risk, of course.

  • King Cobra
    Photo: CappaPhoto / Shutterstock

    How Quickly You'll Die: Within 30 minutes

    The king cobra may not have the most powerful venom of all snakes, but you still don't want to go anywhere near it. One bite delivers enough venom to kill 20 people. It can also take down an entire elephant. The venom is a powerful neurotoxin, which will paralyze and eventually asphyxiate you. Typically this deadly animal is found in Southeast Asia and India.