When ever I walk up to the tank and can't find Spotty, I gently tap on the glass three times with my finger nail and he pops his head out. I sing, "
Ohhh my darlin', tap three times on the ceiling if you want me, twice on the pipes, if the answer is nooooo..."
Jose is special, but they all demonstrate similar behavior.
I can appreciate your extraordinary relationship with Jose, but all fish associate us with food, nothing more.