The Box Jellyfish comes in number one is the list of the world’s most poisonous animals. It is mainly found in the Northern Ocean of Australia and Southern Coast of Queensland. Due to its transparent look, it is difficult to spot it in the water. The toxins of Box Jellyfish attack directly on the nervous system, heart and skin cells. Its sting is so powerful, that due to the overpoweringly pain, a victim dies of either shock, drowning or of heart failure, often before even reaching the shore.