Of all the animal species on the Earth, there are some creatures which may killpeople in only minutes. They may kill if you disturb them somehow because they have the most strongest poison ever in their bodies. Here is the most well-known and poisonous examples of those animals.
Dort Poison Frog

I was stunned when I first heard that a frog is the most poisonous creature of all times. This poisonous frog lives in the rain forests of Colombia. In zoology, it is known as phyllobates terribilis. It is very tiny and only 2 cm. It's poison can kill 150 people or 30000 mice at the same time.It's whole body is covered with a poison layer.
Blue Ringed Octopus

The second most poisonous one living on the Earth. It's poison kills any creature in only 2 minutes. The natural habitat of this octopus species is Japan. According to scientists and zoologists, it's poison is as 10000 times lethal as cyanide.
Box Jelly Fish

This is the third in the top list of most poisonous creatures. It lives in Pacific Ocean. It has 3 m tentacles around it. If you somehow touch it, this means that you live the last 5 minutes of your life.
Inland Taipan

It belongs to Elapidae family in zoology. The most dangerous snake species. Natural habitat of this snake is Australia continent. Three important species of Taipan is Oxyuranus scutellatus, Oxyuranus microlepidotus and Oxyuranus temporalis. It's poison is 100 times more potent than cobra and 50 times more lethal than black mamba. It's poison can kill 100 people at the same time.
Death Stalker

Death stalker lives in Middle East countries. It is known as yellow scorpion. It's 1mg poison can kill 15000 mice. It's poison can kill a person in only one hour after being bitten.