One of the most dangerous fishes on Earth is the Stonefish. They can be found in coastal regions of the Indo-Pacific. The Stonefish has the incredible ability to completely camouflage itself as a rock making it easy for swimmers to accidentally step on it. When stepped on, the Stonefish’s spine releases neurotoxins that are particularly harmful. This does not pan out well for swimmers that get inflicted with the venom. Luckily, there is one type of anti-venom that has been developed to save inflicted swimmers.