I wonder what would the shrimp look like!! The catch is that I was only aware that I had CRS and yellow neos, one day I notice a shrimplet and didn't know were it came from. It grew and that's what It is. It is the only blue velvet I there.
WOW that would be nice! Did you get any new plants lately maybe it hitched a ride on one of them. I would take it out though and isolate it with one of the others so not to mess up the yellows you got!