10. Cone snail
You wouldn’t think something as slow-moving as a snail would be dangerous. But you should make an exception with the cone snail. It is nicknamed cigarette snail because you only get to smoke one stick before its venom stop your nerve cells from communicating with one another.


9. Golden poison dart frog
For its bright and lively color, the Golden Poison Dart frog has enough poison to kill ten grown men. It only needs two micrograms to deliver a death blow. Avoid touching the frog as its poison glands are located just beneath its skin.


8. Box jellyfish
The box jellyfish is considered the most venomous marine animal in the world by the National Oceanic and Atmospheric Administration. It has tentacles lined with thousands of stinging cells that contain toxins. A dose of it can simultaneously attack skin cells, your heart and the nervous system.
7. Asian cobra
It may not be the most venomous snake in the world, but it is the deadliest, literally. More than half of the 50,000 deaths by snakebite a year is caused by the Asian cobra. Stay far away from it as possible, as it can shoot venom at a distance of up to 2 meters.


6. Black Mamba
This snake is not only venomous, but also very fast. It can slither at a speed of 2.5 mph, which most people find difficult to run away from. In a single bite, the Black Mamba can kill 10 people. And anyone who’s been bitten only have 20 minutes to receive an antidote before they breathe their last.
5. Cape buffalo
This giant horned animal is not called Black Death for no reason. Although it is gentle and non-violent most times, it transforms into a monster when threatened. It can attack and charge at a speed of up to 35 mph, and won’t even make a difference between humans and moving vehicles.
4. Puffer fish
Puffer fish can only kill when eaten without proper care in preparation and cooking. It’s not deadly in a sense that it will attack people, but, when ingested, it can deliver toxins that are 1,200 times more poisonous than cyanide.
3. Mosquitoes
Between a mosquito and a crocodile, you would probably steer clear of the latter, because of the obvious threat that you see. A mosquito bite, however, not only stings, but also brings a deadly virus that can cause Dengue Fever, Encephalitis, elephantiasis, malaria, yellow fever, Chikungunya, and, most recently, Zika virus.


2. Tsetse Fly
Another insect on the list. This one brings protozoan parasites that are the causative agent of African Sleeping Sickness. It doesn’t kill quickly, but it can definitely lead to death. Worse, there are no vaccines or medications available for a bite from a tsetse fly.
1. Saltwater crocodiles
Alligators and crocs are both dangerous, but the latter is more aggressive, short-tempered and easily provoked. It drags its victim to the deep, and drown them before making mincemeat out of them. Saltwater crocodile kills more humans than sharks.

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