So my 90G native tank had 24 ghost shrimp, I added my fish on friday and saturday evening all but 4 ghost shrimp where gone, so I emailed the guy I bought the fish from because it was shocking the shrimp just disappeared. The fish are not big enough to eat them, so I wanted to see if he had any ideas. Well appearantly ghost shrimp flee the tank in the presence of certain darter species. Kinda strange but he has seen it a few times.