Vie is absolutely right. Scorpionfish, do not attack except for when they eat their prey (small fish). They are extremely well camouflaged and are hard to see. It takes a sharp eye and sometimes you still can't see them until they move. Never, never, put your hands on coral, it may be a Scorpionfish, besides it's not nice to touch coral, you will damage the animal and could cause a terrible infection in the colony. Also never put your hand on a wreck unless you know exactly what you are touching. There are too many things out there that will sting or injure you. Good for them.