If you’ve never heard of tetrodotoxin, then now you have. While it sounds beautiful, the blue-ringed octopus is one of the most dangerous animals in the world. It’s the size of a golf ball but produces enough toxins to kill a human being. Tetrodotoxin, produced by the symbiotic bacteria in its salivary glands, is a neurotoxin that blocks the transmission of nerve impulses. When it feels threatened, it will attack.
The toxin is over 1,000 times more powerful than cyanide and unlucky for us, there’s no known antidote. What’s even scarier about this animal is that the bite is so small you won’t even feel it, meaning you won’t get treatment on time. These octopi live in the Pacific Ocean near Australia and Japan. If you find one, make sure you don’t pick it up in your hand. Even though there’s a chance of dying from its bite, the octopus also suffers when a human touches it. When it comes into contact with human skin, its energy gets depleted, which makes it more difficult for it to survive in the wild (CNTraveler).
The Assassin Bug is a pretty straightforward creature. You can figure out what it gets up to solely based on its name. If it bites you, it may transmit a deadly disease called Chagas disease. This causes infection and inflammation of human tissue. If you’re sensitive to its bite, you can also suffer from swelling, inflammation, and difficulty breathing. None of that sounds pleasant. If Chagas is left untreated, it can lead to some serious digestive and heart problems.
The parasite will wreak havoc throughout your entire body, leaving you seriously ill. Not only is the assassin bug harmful to humans, but it’s harmful to other bugs too. After it feasts on its prey and sucks all the life out of it, it carries its corpse on its back and uses it as a protective shield. Even though that’s clever, it’s sinister. It’s best to avoid this bug at all costs if you do happen to see it in various states across the USA (Far and Wide).
Because dogs are pets, it’s hard to believe that they’re also some of the most dangerous animals in the world. Once trained and vaccinated, dogs are mostly harmless. But it’s the dogs that are untrained and unvaccinated, that usually live in Asia and South America, that are the dangerous ones. They may carry a host of diseases, including rabies. If a rabid dog bites you and you don’t receive the vaccination in time, you will die.
Rabies starts with a high fever and body aches, much like the flu. It then turns into a deadly neurological disease that includes anxiety, confusion, cerebral dysfunction, agitation, and eventually death. Luckily, there is a preventative vaccine humans can receive before traveling to remote places of Asia and South America if you do happen to get bitten by a dog. However, if you’re still bitten by a dog, you need to receive several shots post-bite, even if you’re vaccinated. Again, it’s always better safe than sorry (Far and Wide).
The Brazilian Wandering Spider is one of the most venomous spiders on the planet. Once it bites a human, it delivers a neurotoxic venom that may kill a human, Children are especially susceptible. These spiders aren’t small, either, they can be up to seven inches long. It likes hiding in densely populated areas, mostly in cozy places like the inside of shoes, log piles, cars, clothes, and other nooks and crannies where humans are likely to stick their hands.
When they’re angry or disturbed, you’ll see their distinctive red jaws. It’s like a warning sign you don’t want to mess with. If you don’t receive the antivenom, you’ll experience fever, vomiting, paralysis, and eventually death. If you are bitten, seek medical help immediately. Luckily, it’s unlikely you’ll come across one of these spiders on your trip to South America, but if you do it’s best just to stay as far away as possible (CNTraveler).
Whenever you see a cow grazing the field, you wouldn’t think it’s one of the most dangerous animals in the world. They kill more people than sharks. About 22 people die every single year from a cow attack, which includes trampling or kicking, specifically blunt force trauma to the head or chest, especially for those interacting with cows and living on a cattle farm.
Cows that are sick or stressed tend to be the most dangerous animals since they become aggressive. If you ever see a cow without its herd, stay away. These solo animals are more likely to be afraid or stressed (Far and Wide).
We all know crocodiles are terrifying. They have large jaws with incredibly sharp teeth, enough to rip straight through human flesh. Well, saltwater crocodiles are some of the most dangerous animals in the world. They’re aggressive, and fearsome, and kill more people than sharks do every year. They always tell us we need to fear sharks, but it’s the crocodiles we need to be afraid of. These animals are found in the Indo-Pacific water and can travel as far south as Australia. Their bite is so strong that it equates to the bite of a T. Rex.
They’re pretty much the present-day dinosaurs. It’s just another reason to stay far away from these animals. These crocodiles don’t only stay in saltwater either, despite their name, they also make it into freshwater. These animals are known for their aggression because of their sheer size and competition with other crocodiles (Flamingoof).
Jellyfish are known for their poisonous tentacles that can cause a killer sting. Their stings leave scars and can leave on the injury on a human body for days and weeks. But that’s a normal jellyfish. Box jellyfish are an entirely different story. These jellyfish float around in the tropical ocean, mainly where the Indian Ocean meets the Pacific ocean. Luckily, they can only swim five miles per hour, but that doesn’t make them any less dangerous.
Their tentacles can grow up to 10 feet long, so even if you don’t think you’re near one, there’s the chance you’ll swim directly through their tentacles. These contain thousands of stinging cells that carry a toxic poison that affects the nervous system, skin, and heart. It causes paralysis, cardiac arrest, and death. If you’re a young child or the elderly, there’s a high chance you’ll die from the sting alone. Even though an anti-venom exists, it’s unlikely you’ll receive treatment on time, since you’ll be dead before you even get to the hospital (Flamingoof).
These roundworms, while microscopic, cause enough damage in the small intestine of a human that wreaks havoc on the entire body. Humans get infected by accidentally ingesting their eggs, whether from raw produce or water, in developing countries in Asia and South America. Death from this roundworm happens more often where treatment is not found, in places with ineffective sewage disposal systems.
Symptoms from heavy infections include loss of appetite, poor absorption of nutrients from food, and unexplained weight loss. Children who are infected with this roundworm typically experience stunted growth, since their body is unable to absorb important nutrients. If a large number of eggs are swallowed and then move to another part of the body, it could cause bowel obstruction, which causes a variety of problems down the line (Far and Wide).
There are over 12,000 species of ants, and every single one differs greatly from the other. There are 280 fire ant species around the world. A sting from a fire ant isn’t just uncomfortable but may cause fatal anaphylaxis if you’re allergic to it. Symptoms from the bite are immediate. It will start to itch and then turn into a big, red welt.
The bites eventually turn into fluid-filled pustules. Their bites are strong enough to kill a small animal and cause a severe human reaction in people. You’re more likely to come into contact with them in the summertime (Far and Wide).
Bees aren’t only dangerous if you’re allergic to them, although that’s usually the main cause of death by a bee or hornet. These insects, plus wasps, are usually grouped. In Japan and China, the Asian Giant Hornet (also commonly known as “Murder Hornets”) can kill a human being, whether you’re allergic or not. They’re the size of a human thumb and typically affect farm workers. Every single year, around 50 people die from hornet attacks, mainly due to an allergic reaction to the sting.
One of the scariest parts about this hornet is that they can sting repetitively. It’s not a one-time sting, which is a horrendous thing to think about. Their stings contain neurotoxins, and their stings are powerful enough to puncture a beekeeper’s suit, which means not even the beekeepers are safe. Even though it’s rare for a swarm of bees to attack a human, it’s not unheard of (Far and Wide).
This is one of the most dangerous animals in the world, and definitely one of the most dangerous flies. Even though it only grows to the size of a common housefly, it can kill a human. They mainly lurk in Sub-Saharan Africa. Similarly to mosquitos, they suck the blood of human beings and deliver diseases such as Trypanosomes, a parasite. Unfortunately, there are no cures for this parasite, so if you happen to get it, you’re out of luck.
The parasite is the main cause of African Sleeping Sickness, which is a disease affecting the nervous system of humans, and thus disrupting sleep patterns. The disease can also be fatal, so it’s best to avoid getting bitten by this fly altogether. Some people, they develop a skin rash after a bite from the fly, but aching muscles, fever, and headache are also common symptoms (Flamingoof).
We’ve seen crocodiles as one of the most dangerous animals on this list, but we also have to include alligators. Even though they’re terrifying to look at, just like their cousin the crocodile, they don’t kill as many people. But that doesn’t mean they’re not dangerous. In fact, since 1948, there have only been 25 deaths from an alligator. But every single year, there are around seven attacks from an alligator in Florida. It’s best to just stay away from an alligator if you happen to see one.
It’s unlikely an alligator will ever bite, but if it does happen to bite someone, it likely means they’ve already bitten someone in their past and are exhibiting repetitive behavior. So you should call wildlife authorities. Additionally, alligators are only likely to attack when they’re feeling provoked, defensive, or aggressive. They won’t randomly attack you and are much more harmless than the crocodiles (Far and Wide).
We’ve seen tons of different animals and insects on this list, but we haven’t yet spoken about humans. We’re the most dangerous animals in the entire world. We’re the ones ruining our planet and killing off endangered species through hunting, poaching, and urban development. There’s also war, random violence, terrorism, and assault that kill thousands of people every single day.
Lives are cut short and families have broken apart, all because of a horrendous act from one human being. We can end life on this planet, and if it doesn’t come from a world war first, it will come from climate change, which is also due to human activity. This comes from pollution, oil, single-use plastic, and destruction of forests. Seriously, the animals on this list have nothing compared to us, the most dangerous animals in the world (Flamingoof).