Maybe Stonefish would never win a beauty contest, but it would definitely win the top prize for being The World Most Venomous Fish. Its venom causes such a severe pain that the victims of its sting want the affected limb to be amputated. It is described as the worst pain known to man. It is accompanied with possible shock, paralysis, and tissue death. If not given medical attention within a couple of hours it can be fatal to humans. 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.