Sharp teeth or aggressive behavior are not the only weapon animals can possess.
Dangerous internal causes might be the consequence of the infiltrating of poison, provided by certain animals and fish representatives.
Here one may find top ten poisonous species: 1.
Cubical jellies are the most venomous creatures in the world.
Their poison affects the heart, nervous system and skin cells, which lead to a terrifying shock condition, when their victim either get drowned or die from a heart attack.
In the last 60 years Cubical jellies have taken 6000 human lives.
Their distribution includes the tropical Indo-Pacific, tropical and subtropical oceans, including the Atlantic and east Pacific with species as far north as California, the Mediterranean and Japan and as far south as South Africa and New Zealand.
2.
The very famous King Cobra could not be remained unmentioned, because it is in her nature to eat other snakes as well as to have enough poison to kill both a human (immediately) and an elephant (in three hours).
It is distributed in South and Southeastern Asia.
3.
Marbled Cone Snail can kill more than 20 humans despite its beauty.
Its poison is used to catch their prey, but still humans should be aware of meeting them in a warm salt environment.
There are 20 human deaths marked already.
4.
In the size of a golf ball the Blue-Ringed Octopus has venom, which might kill an individual.
Frankly speaking, it is in its power to kill about 30 adults in minutes.
When the octopus is disturbed or removed from the water, it gets dark, and the rings are bright electric blue, and this color change gives the animal its name.
So, people should be informed about such species, especially around southern New South Wales and South Australia.
5.
North Africa and Middle East is a natural habitat for Death Stalker Scorpion with a powerful cocktail of neurotoxins which causes an intense and unbearable pain, then fever, followed by coma, convulsions, paralysis and death.
6.
"The World Most Venomous Fish" is a title referred to a stonefish.
Stonefish stores its toxins in gruesome-looking spines that are designed to hurt would-be predators.
Stonefish mostly live above the tropic of Capricorn, often found in the shallow tropical marine waters of the Pacific and Indian oceans, ranging from the Red Sea to the Queensland Great Barrier Reef.
7.
The most venomous spider (according to Guinness World Record Book) is a banana spider or the Brazilian Wandering Spider.
Besides being a cause of multiple deaths, they are also so dangerous because of their wandering nature.
They often hide during daytime in highly populated areas inside houses, clothes, boots, and cars.
8.
Inland Taipan of Australia has also gained a popularity as one of the most poisonous snakes, which contains enough venom to kill 100 human adults or an army of 250,000 mice.
9.
The specific danger of rain forests in Central or South America is Poison Dart Frog.
Only 2 micrograms of its lethal toxin (the amount that fits on the head of a pin) is capable of killing a human or other large mammal.
10.
The skin and certain organs of many puffer fish (fugu) are very poisonous to humans.
According to statistical researches, there were from 20 to 44 incidents of fugu poisoning per year between 1996 and 2006 in all of Japan and up to six incidents per year led to death.