There is a pan-dimensional, incorporeal fish floating approximately half your arm’s length behind your head at all times. It is quantum locked to your personal field of view, your brain waves serving as the superconductor. This means that even if you moved your head fast enough to see it, you could not. It is possible to see everyone else’s fish. Some figure it out on their own, but most usually start seeing them after being told about it. That is how it was for me and the person who told me. Who told her, I have no idea, but I fully trust her expertise.
She’s written a book on the subject, Pan-Dimensional Incorporeal Fish’s Non/Existence.
The eBook version is abbreviated E-PIF-NE.
It is not available for sale. You simply have it one day.