If you’ve chosen to visit Australia so that you can see all the incredible animals, then this crazy stonefish should be on your bucket list. Of course, that’s only if you don’t care for your life or the chance of ever getting back home again. These reef stonefish, which can totally camouflage themselves by looking like corals, can actually inject you via 13 stout dorsal fin spines. And worse yet, if left untreated, they not only cause severe and debilitating pain, but also heart failure and possibly, death.