Could this be the answer to paranormal things!!?

The fish thing is interesting, regarding "tricking" one of the many senses. However, if a predator fish touched or smelled the "invisible" fish, would it know it was its prey, or would it freak out? As far as paranormal creatures, I suspect it's possible that they can "trick" our sense if sight into not seeing them (or only certain individuals can "see" them)... however, I would ume they would need to trick all of our senses - touch, taste, smell, etc. But could they also fool our equipment as well? To my knowledge, there's no equipment that can perceive the alleged paranomal either. Take carbon monoxide - we can't see it, smell it, taste it, touch it, nor sense it, but it is there and can harm us. But there are carbon monoxide testers (equipment) that can perceive the stuff that we cannot. Interesting theory though.