Hippos are big, girthy, one of the strongest animals on the planet, and have a very impressive set of incisors.
The aggressive and territorial mammals are responsible for an estimated 500 deaths annually, which lands them on our list.
Don't be fooled by their cartoonish appearance, for elephants are also a dangerous, and deadly, mammal.
They're territorial and protective of family members and are responsible for an average of 500 deaths per year.
These reptiles are an apex predator and share a heritage with dinosaurs.
In fact, crocodiles are part of a group of animals known as archosaurs, or "ruling reptiles."
Every year crocodiles kill about 1000 people.
Their large powerful jaws and sharp teeth make quick work of victims.
Next on the list we have a parasitic worm; Ascaris lumbricoides, a human roundworm.
It can cause a dangerous infection of the small intestine known as ascariasis.
This kills an estimated 2500 people a year.
They may be tiny but these predatory arachnids pack a deadly punch.
Stings, which are delivered by a stinger on the tip of the critters' long tails, are estimated to kill more than 3000 people every year.
The number is made even more staggering considering only 25 of the almost 2000 species are deadly.
These species are located across northern Africa, the Middle East, India, Mexico and parts of South America.
We have another small but extremely deadly contender on the list here; meet the Tsetse fly, which is found across sub-Saharan Africa.
It's not the animal itself that's dangerous, but the infection that comes after a bite.
The insects carry a parasite that causes African trypanosomiasis, or sleeping sickness; an often fatal illness that can invade the central nervous system.
Diseases transmitted by the Tsetse fly kill around 275,000 people annually.
And we have another deadly creepy crawly; kissing bugs.
These fearsome insects feed on blood and are found across southern US, Mexico, Central America, and South America.
They also happen to transmit a dangerous disease called Chagas disease, which left untreated can cause heart and digestive problems.
The insects are believed to cause 12,000 deaths annually.
It may sound bizarre but freshwater snails kill an estimated 20,000 people per year.
How so?
The molluscs carry a parasitic worm which can infect people with a disease called schistosomiasis.
Symptoms indicating a chronic infection can include; enlarged liver, intense abdominal pain and blood in the stool or urine and/or problems passing urine.
Man's best friend can be a dangerous thing.
While dog attacks can claim lives, canines infected with rabies are a leading cause of animal-related deaths in humans.
They are responsible for around 30,000 human deaths per year and the vast majority of these are from rabies; an often-fatal viral disease transmitted by infected animals.
The world is home to around 3000 different known snake species, of which about 600 are venomous.
The deadly variations of these slithering reptiles are estimated to claim 100,000 lives annually.
Pictured is the saw-scaled viper, a reptile found across Africa, Arabia, and southwestern Asia, which is believed responsible for the most snake deaths annually.
With that said, Australia's inland taipan is considered the world's most venomous snake.
Those buzzing blood-suckers mosquitoes are the deadliest animal in the world - and chances are you have one in your house right now.
The insects are estimated to cause between 750,000 - one million deaths every year.
This is because they are a vector of disease, transmitting illnesses like malaria, dengue fever, zika virus, Japanese encephalitis and more.
The former - malaria - is by far the most vicious. In 2021 it claimed 619,000 lives.