Scariest animals in the world - The animal kingdom is full of diversity and beauty. But even in all its beauty, there are some animals that can strike fear in anyone. In some cases, animals can be deadly predators, but in other cases their own appearance is terrifying on its own. Click through this gallery and be amazed by some of these animals.

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Black mamba - This species was given this name because of the color inside its mouth. They have a deadly poison, are aggressive, and extremely fast. According to National Geographic, the venom from this snake needs just 20 minutes to be fatal once it bites; however, there is a healing antidote.

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Gorilla - They are big and strong animals. While not as aggressive as King Kong, they can still be pretty dangerous when they feel threatened. According to an article published by the BBC, it is difficult to know for sure at what level a gorilla can be considered a danger to humans.

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Komodo dragon - They are the heaviest lizards in the world. They can reach up to three meters in length and weigh up to 136 kilos. According to National Geographic, this animal feeds on pigs, deer, buffalo, and even humans. The Komodo dragon has venom glands that lower the blood pressure of its prey, inducing shock. It is then that this animal, with its powerful teeth, attacks and yanks pieces of its victim's flesh off.

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Goliath birdeater - It is one of the largest spiders in the world and, as its name suggests, it is large enough to feed on small birds. According to Live Science, this spider can be as big as a child's arm. Its venom is not so dangerous to humans, causing only pain and nausea, says About Animals.

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Scorpion - They look scary and have long been considered dangerous. Scorpions are commonly found in some deserts; however, they can also be found in forests. According to National Geographic, there are approximately 2,000 different species of scorpions, but only 30 to 40 have enough venom to actually kill a person.

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Polar bear - This extremely friendly-looking animal is actually a very dangerous carnivorous mammal. According to an article published by Fox News, due to global warming and climate change, these bears have gone looking for food on dry land. This led to more cases of polar bears attacking humans. From 1960 to 2009 there were less than 10 polar bear attacks on humans; however, from 2010 to 2014 that number increased to 15.

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Aye-aye - These primates can only be found in Madagascar. They have large eyes, which are very sensitive, thin fingers, and big ears. According to National Geographic, in Madagascar, many people believed that the aye-aye was an omen of bad luck. Therefore, as soon as these animals were spotted they were killed. Nowadays, they are protected by law.

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Celebes crested macaque - This monkey of peculiar appearance usually does not reach great proportions. According to a BBC article, this monkey species can recognize stress, anxiety, and aggressiveness in the facial expressions of others of its kind; however, the sharp teeth of these monkeys are a good enough reason to stay away from this animal.

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African lion - Of course we're all familiar with the lion. This animal, dubbed 'king of the jungle,' weighs between 120 to 190 kilos. A 2015 article in the online edition of Smithsonian magazine reports that in Tanzania—the site with the largest lion population in Africa—593 people were killed and 308 injured due to lion attacks between 1990 and 2004.

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Tiger - Another feline that needs little introduction is the tiger. When hunting, tigers resort primarily to the senses of sight and sound. According to World Wild Life, a tiger can eat about 40 pounds of meat at a time.

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Star-nosed mole - This bizarre mole seems to have come from another planet. According to National Geographic, this animal with a star-shaped nose is the fastest eater in the world because it can eat an insect or worm in just a quarter of a second. Interestingly, this mole is virtually blind, but uses its fantastic nose to hunt prey underground.

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Giant African snail - It is one of the biggest gastropods in the world. While it is certain that anyone can outrun this animal, if this gastropod comes into contact with a human being, it can cause meningitis, according to Animals.mom.me.

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Anaconda - It's the biggest snake in the world. It can grow up to eight meters in length and weigh up to 250 kilos, according to National Geographic. They feed on animals such as wild pigs, deer, birds, and even jaguars. There seems to be no animals that the anaconda, in its natural habitat of South America, cannot eat.

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Portuguese man o' war - Some people confuse the Portuguese man o' war with a jellyfish. But in fact, they are totally different animals. The Portuguese man o' war is a siphonophore, which means that it is an animal made up of a colony of organisms that work together. For a human being, the sting of a Portuguese man o' war can be extremely painful but hardly fatal, according to National Geographic.

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Japanese giant hornet - When stinging a human being, the venom of this wasp causes the destruction of blood cells, which can cause kidney failure and may consequently lead to death. According to a CNN article published in 2013, these wasps led to the deaths of 42 people in China in just a few months.

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Nile crocodile - This crocodile has a reputation for being a great predator, including for feeding on humans. According to National Geographic, it is estimated that about 200 people die annually due to attacks by these crocodiles on the banks of the Nile. On average they measure almost five meters in length and weigh approximately 230 kilos.

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Shoebill - This bizarre-looking bird can grow anywhere up to one and a half and two meters in height. Interestingly, each female lays two eggs, but only one of her offspring survives, according to BBC. In most cases, it is the older offspring who kills the younger sibling.

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Whip spiders - Unlike common spiders, the amblypygid does not build webs and has extremely long claws, as reported in ScienceDaily. According to the article, this spider looks terrifying, yet it is very delicate and timid.

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Marabou stork - This stork has a bare head and neck, and looks unfriendly. By nature, this carnivorous bird feeds on any animal that is large enough to be ingested.

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Lobster moth caterpillar - This moth species looks unattractive and somewhat scary. According to The Telegraph, it used to be believed that it could be poisonous but this was found to be untrue. In fact, the only thing scary about this caterpillar is its appearance.

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Hydrocynus goliath - This fish can be found in Africa, more specifically in the Congo River. It has protrusions like daggers. According to Animal Planet, this fish is not afraid of crocodiles and even feeds on little ones. According to the same site, there are also reports of attacks by this fish on humans.

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Africanized bee - This type of bee is smaller than the European species so it carries less venom, reports the BBC. However, the real threat of these bees comes when they're defending their beehive. They respond to threat with a group attack, which could lead to the death of whatever is threatening the beehive.

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Scolopendra cataracta - According to National Geogrpahic, this centipede can search for prey in water or on land. This amphibious centipede, like others of the scolopendra species, is also poisonous. According to the article, the poison is likely to cause an excruciating pain to humans.

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Brown bear - Here is an animal that you will not want to cross paths with. Despite their large size, they are extremely fast animals. They can be a danger to humans, especially if they are feeling threatened. According to National Geographic, they can measure between 1.5 meters and almost 2.5 meters in length.

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