Top 30 Most DANGEROUS Animals in the World

Top 30 Most Dangerous Animals in the World

Welcome to WatchMojo, and today we’re counting down our picks for the deadliest creatures and beasts to inhabit the planet. We won’t be allowing humanity as part of our criteria for this list.

#30: Ticks
They may be small, but never underestimate the danger these tiny insects can pose to humans. Ticks are a species of arachnid that can transmit a number of diseases to humans, including typhus and Rocky Mountain spotted fever. Additionally, certain subspecies of ticks, such as those found in Australia, can even cause temporary paralysis with their bites. To make matters worse, the extremely tiny size of most ticks make them difficult to find at first glance. This means that many victims of a tick’s feeding process may not discover these parasites until it’s too late, and a trip to the emergency room is on the horizon.

#29: Nile Crocodile
There’s a very good reason why certain mythological creatures from ancient Egypt so often take the forms of animals, such as the hippopotamus or a crocodile. This is because these sorts of animals were often seen as river killers, sources of fear and awe. Perhaps this also applies to the fearsome reputation of the Nile Crocodile, which consumes more human victims than nearly every other example of its species. These man-eaters dwell primarily within African countries, including along the Nile in Egypt, albeit in historically smaller numbers. We can’t personally think of any place we’d want to run into this toothy beast, however.

#28: Assassin Bugs
There are a lot of sub-divisional categories out there of the Reduviidae, a family of predatory bugs that are known for ambushing their prey and spreading disease. These assassin bugs are specifically known for passing along Chagas Disease, a curious contagion with wide-ranging effects. Those afflicted with Chagas Disease may not initially see symptoms greater than some swelling or pain at the bite point. However, those that are left untreated could potentially see nerve damage or even heart disease later on in life, as a result of an assassin bug attack.

#27: Indian Red Scorpion
An encounter with any kind of scorpion probably isn’t ideal, but the Indian Red Scorpion is on a whole other level. This dangerous arachnid is one of the deadliest of its kind, possessing a painful sting that afflicts its victim with multiple, horrible symptoms. These include, but aren’t limited to, vomiting, sweating, shock, breathlessness and a racing or abnormal heart rate. Indian Red Scorpions have been known to tragically take the lives of children within their native India, although survival is achievable, so long as the patient receives immediate medical attention.

#26: Inland Taipan
Snakes. Why did it have to be snakes? The Inland Taipan is an extremely venomous serpent that’s found primarily within Australia. The toxicity of the Inland Taipan’s venom is the strongest of its kind, with a single bite possessing enough lethal killing power to fell a hundred humans. Thankfully, the Inland Taipan’s inherently reclusive nature means that it usually seeks to avoid a confrontation rather than instigate one. This latter approach can also be found in its cousin, the Coastal Taipan, which actively acts aggressively towards human invaders. This essentially means that one should avoid any contact with either of these dangerous, slithering animals.

#25: Blue-Ringed Octopus
The world of dangerous octopi is one that’s usually reserved for movies, such as the one designed by Ray Harryhausen for the film “It Came From Beneath the Sea.” The reality, however, is that the Blue-Ringed Octopus exists, and it arrives armed with a powerful neurotoxin. The demeanor of the Blue-Ringed Octopus is similar to that of the Inland Taipan, in that it generally doesn’t seek out attention. However, if it’s disturbed, beware! The bites of these underwater animals aren’t very painful, but this aforementioned neurotoxin is deadly, and can cause paralysis, respiratory failure and death only mere moments after contact.

#24: Anacondas
The lethality of anacondas thankfully doesn’t really apply to humans, since these aggressive predators don’t, as a rule, seek us out for confrontations. That said, these powerful serpents are still incredibly dangerous members of the animal kingdom, thanks to their incredible constrictive prowess. They can hunt and kill animals much larger than they are, including sheep and even jungle cats, such as jaguars. That’s not too shabby, considering anacondas actually aren’t even venomous! Interactions between humans and anacondas may not occur as often as they do in the movies, but the curious can rest assured knowing that these apex predators almost always come out on top.

#23: Komodo Dragon
Speaking of apex predators, the Komodo Dragon is the king of the hill when it comes to modern day tyrant lizards. They’re the largest living example of the lizard species today, and dominate hunting grounds and food chains wherever they’re found, primarily within the island of Indonesia. They’re known to hunt by stealth, utilizing patience to pounce and tear open their victims. The Komodo Dragon is also known to scavenge graves for carrion or eat basically whatever’s in front of it during its sparse feeding times. This lengthy time between hunts thankfully lowers the Komodo Dragon’s historical relationship with humans, although encounters between the two have been known to be fatal.

#22: Golden Poison Frog
It just sort of says it all right in the name, doesn’t it? The Golden Poison Frog possesses one of the most intense and potent toxins in the world. The danger here lies within the frog’s actual skin, meaning that one needs to either touch or eat the Golden Poison Frog, in order for this toxin to take effect. Should this occur, however, the secretion of its batrachotoxin will cause paralysis, respiratory failure and death in a most dramatic and painful fashion. The Golden Poison Frog is found primarily within the Colombian rainforest, but their deadly and dangerous reputation endures far beyond the confines of the underbrush.

#21: Cone Snail
The tiny, humble snail may not be the first animal that comes to one’s mind when thinking about danger levels, but therein lies the irony. The Cone Snail is beautiful on the outside, but deadly on the inside, since these underwater creatures are extremely poisonous. Some smaller species possess little danger to humans, but the larger and more aggressive examples often employ tiny harpoon projectiles that can pierce even protected divers. These stings then transmit the Cone Snail’s potent toxin, which causes numbness, swelling, blurred vision, paralysis and, eventually, death. There is no known antivenom.

#20: Killer Whales
Also known as orcas, or the wolves of the sea, killer whales earn the “killer” in their name. These highly intelligent apex predators hunt a variety of prey, ranging from fish and seals to even sharks and whales. While there have been some incidents between wild killer whales and people, fatal attacks have yet to be recorded. However, it’s a different story for killer whales in captivity. Since the late 1960s, there have been dozens of incidents involving captive killer whales attacking humans. These have resulted in injuries and even fatalities, generating lots of discussion surrounding the controversy of keeping them in captivity. One killer whale in particular, known as Tilikum, was involved in the deaths of three people, including two of his trainers.


#19: Deathstalker Scorpion
This little guy is one of the reasons scorpions have such a bad rep, as it is responsible for three quarters of scorpion-related deaths annually, with young children and the elderly especially at risk. The third most venomous scorpion in the world, the Deathstalker’s venom is extremely potent and painful, and is actually resistant to treatment. Though healthy adults won’t necessarily die from its sting, much anti-venom would likely be required. It is found primarily throughout North Africa and the Middle East, so if you’re in the neighborhood, watch out.


#18: Cassowary
If you’re looking for proof that birds are related to dinosaurs, look no further than the cassowary. Armed with powerful legs and dagger-like claws, the cassowary can deliver a kick that will break bones and slice through flesh. While these large birds are cautious around humans, more than a hundred instances of people being attacked by cassowaries have been reported—most of which involved food. Thankfully, fatalities are rare. Though it’s possible for the cassowary to be partially domesticated, owning one can still be dangerous. In April 2019, a Florida man was killed by a cassowary he raised when it fatally injured him after he fell down. The cassowary’s potential for harm has earned it the title of the world’s most dangerous bird.


#17: Pufferfish
While not the biggest or most ferocious entry on our list, the pufferfish is nevertheless extremely dangerous. If inflating its body doesn’t discourage predators, then its high levels of toxicity sure do. Pufferfish possess tetrodotoxin, which is over a thousand times more lethal than cyanide. A single pufferfish has enough tetrodotoxin to kill 30 adult humans. In Japan, pufferfish known as fugu are considered a delicacy, but only licensed chefs are allowed to prepare it, as even the slightest mistake could prove fatal. In 1958, the number of people who died from fugu poisoning peaked at 176, but has decreased over time, with about 20 fatalities being reported in Japan since the turn of the 21st century. To this day, no known antidote exists.


#16: Cape Buffalo
When you think of the most dangerous animals in Africa, the Cape Buffalo may not be your first, or even fifth, thought. They are responsible for hundreds of deaths every year, however, and eagerly go after jeeps and trucks, overturning them with ease. They are sometimes referred to as “The Black Death” and have been known to fight off crocodiles and lions. Their ability to run at 40 miles an hour despite weighing 2,000 pounds makes them one of the most dangerous animals in not only Africa, but the entire world.


#15: Japanese Giant Hornet
Afraid of bugs?Then these hornets are your worst nightmare. The largest of its kind on earth, Japanese giant hornets are feared for their highly potent venom, which can kill a person if stung enough times. Even if the venom doesn’t kill right away, those unfortunate enough to be stung by one are forced to endure intense, searing pain. On average, these insects kill an estimated 10-50 people a year in Japan, and injure many more. Recently spotted in the United States, this invasive species poses a significant threat to honeybee populations and the larger ecosystem. With such a terrifying reputation, it’s no wonder that they were given the nickname “murder hornets.”


#14: Grizzly Bear
Weighing between 400 to 800 pounds on average, the grizzly bear is a force to be feared. While they may not actively hunt humans, urban expansion into their territory has made grizzlies more dangerous, as they’ve come to associate humans with food. While rare, attacks from grizzlies are often fatal. Mother grizzlies are especially dangerous, as they’re more likely to attack if they feel their cubs are threatened. Along with their enhanced sense of smell and powerful claws, grizzlies can easily outrun humans, and have a bite force strong enough to crush bowling balls. When heading out to grizzly country, knowing how to navigate an encounter with one could mean the difference between life and death.


#13: Brazilian Wandering Spider
Unlike most spiders, this creepy crawly does not make its home in a web or lair. Rather, it lives a nomadic lifestyle, hunting and ambushing its prey. This makes the Brazilian wandering spider even more dangerous, as it often wanders into human settlements. Known for hiding in dark places such as boots and shoes, these spiders thus bite people in self-defense. While its venom can be treated with antivenom, it is still the most potent poison of any spider. It directly targets the nervous system, which can potentially be fatal, making it extremely dangerous—especially for children. We’d expect nothing less from a spider whose genus translates to “murderess.”


#12: African Elephant
Elephants are one of the most popular creatures on the planet, but that doesn’t make them any less dangerous. They have been known to become extremely aggressive without warning, making them one of the more unpredictable animals on the planet. This is especially dangerous because they frequently come into contact with people, through safaris and other ventures. It seems like at least once a year there is a story about an elephant wandering into a village and trampling dozens of people.


#11: Honey Badger
Considered the most fearless animal alive by the Guinness Book of World Records, the honey badger is one of nature’s most relentless hunters. It possesses powerful claws and fangs that can break open tortoise shells. It also has a strong resistance to venom, and a loose but thick hide tough enough to resist blows from a machete. The honey badger won’t hesitate to challenge and even repel much larger predators such as leopards and lions. They’re also highly intelligent, and can escape from or break into secure enclosures. Because they often attack livestock and bee farms, they increasingly get into conflicts with humans. When provoked, they are terrifying, and will fight to the death if escape is impossible. Honey badger don’t care!


#10: Hippopotamus
While hippos may not necessarily come across as an extremely dangerous animal, they are aggressive and have been known to attack people without provocation. They are usually found in Africa, and are one of the larger animals responsible for killing the most humans on that continent. Despite weighing several thousand pounds, a hippo can run as fast as 20 miles per hour, and has an extremely powerful mouth. They can decimate safari vehicles without breaking a sweat.


#9: Saltwater Crocodile
The largest reptile in the world, saltwater crocodiles are extremely dangerous and are responsible for attacking hundreds of people every year. They are found all over the world in all sorts of habitats, including both saltwater and freshwater. They have the strongest bite of any animal currently in existence, with their jaws capable of applying over 3,500 pounds of pressure per square inch. They have an alarming tendency to consider humans as their prey, although only if we venture into their territory.


#8: Bull Shark
Alongside great white and tiger sharks, the bull shark is one of three shark species most likely to attack humans unprovoked. While the great white has been implicated in more unprovoked attacks on humans, several factors make the bull shark more dangerous to humans than any other shark species. These include its high aggression level, a much more powerful bite force than the great white, and (most dangerous of all) its ability to thrive in both saltwater and freshwater sources. In rare cases, bull sharks have even been sighted going far up both the Mississippi and Ohio rivers. Some experts believe that the bull shark was responsible for the Jersey Shore attacks of 1916—an event that inspired the novel “Jaws.”


#7: Sloth Bear
Native to the Indian subcontinent, sloth bears may look adorable and fluffy, but they’re extremely aggressive. They have a reputation for regularly attacking humans more than any other bear. With human populations growing, and their territory decreasing, human and sloth bear encounters have gradually increased as the animals wander into towns in search of food. Due to their poor eyesight, sloth bears are easily startled, and thus more likely to lash out in self-defense or to defend their cubs. Between 1998 and 2000, 137 sloth bear attacks, including 11 fatalities, occurred in the North Bilaspur Forest Division in the state of Chhattisgarh. In 1957, a specimen known as the Sloth Bear of Mysore achieved notoriety for killing at least 12 people and seriously injuring over 20 others.


#6: African Lion
Take one look at an African Lion and you know that you are putting your life at risk just by getting within striking distance of the animal. This doesn’t seem to stop humans from going on safaris or attempting to tame them, however. As a result, hundreds of people die every year at the hands of the African Lion. Luckily, they do not actively seek out humans, but their amazing speed and razor sharp teeth and claws mean that if they do decide to make you their prey, you are in a lot of trouble!


#5: Polar Bear
Raised in the harsh environment of the Arctic Circle, polar bears have evolved into one of the world’s apex predators. Reaching heights of more than nine feet and weighing over 1,000 pounds, the polar bear is the largest terrestrial carnivore on earth. While normally cautious by nature, hungry polar bears will kill and eat virtually anything, big or small, including humans. With the loss of their habitat due to climate change, and a lack of fear towards people, more and more polar bears are drawn towards human populations in search of food. Given the polar bear’s immense size, powerful claws, and teeth capable of tearing a human to shreds, any encounter can prove fatal.


#4: Tiger
As one of the world’s most iconic animals, the tiger has left its mark in history, mythology and popular culture. Along with being the largest cat species, tigers can be divided into several subspecies, such as the common Bengal tiger (xref), and the Siberian tiger (xref). With jaws strong enough to crush the throats of its prey, and paws capable of inflicting heavy blows, tigers are apex predators that are praised and feared for their legendary strength and hunting prowess. Some tigers have even acquired a fearsome reputation for being man-eaters, with the most infamous being the Champawat Tiger, which allegedly killed more than 400 people over the course of seven years at the turn of the 20th century.

#3: Box Jellyfish
If you come across one of these creatures while scuba diving or floating in the sea, get away as fast as possible. The box jellyfish is one of the most venomous animals on the entire planet, a category that includes frogs, scorpions, and snakes. It can possess as many as 60 tentacles, and their sting can kill a human, either by paralyzing them which leads to drowning, or by stopping their heart. Luckily, many people survive encounters with the box jellyfish, but not without first experiencing excruciating pain.


#2: Black Mamba Snake
Despite being the second most venomous snake in the world, the black mamba makes our list because it is the most feared snake in all of Africa - which is saying something. Their bite has been called the “kiss of death” and can kill a human in less than 10 hours if not treated effectively. While the black mamba usually tries to flee from humans, they will attack if they feel threatened, delivering deadly strikes in rapid succession.


#1: Mosquito
With a list that includes crocodiles, lions, and sharks, it may be difficult to believe that mosquitoes are the most dangerous animals on the planet. While they won’t eat you, this small insect is responsible for killing over a million people each year because it spreads diseases, the most famous of which is malaria. In fact, they are said to transfer diseases to over 700 million people annually. They are located all over the world, from tropical areas to cold climates, and are responsible for more human deaths than all the other animals on this list put together.


Which of these creatures haunts your nightmares? Let us know in the comments!