Arachnophobia is a very common fear among the population. Fortunately, spider bites are rather rare and mostly harmless, but being attacked by a venomous spider can put an end to your life in a matter of hours. The funnel-web spider, whose body length ranges from 0.5 to 2 inches, is the most dangerous in the world.

Hailing from Australia, they have massive fangs and can bite through a fingernail. The male might even enter buildings in search of a female and will become aggressive if cornered or disturbed.