I have been downsizing the amount of tanks I have to take care of and in the process I added 3 tiny emerald crabs and 2 serpent stars to my main reef from my frag tank. the very first night my 2 yr old cleaner shrimp went missing . I had also added my clowns and their anemone at the same time , so I kinda thought maybe it was the anemone . that was about a month ago . this weekend I tried adding 2 more cleaners to the oposite side of the tank from the anemone . at lights out they were still in the cave were I placed them . next morning I find 1 half eaten cleaner and no sign of the other . who is eating my cleaner shrimp ? I have a good feeling it is an emerald , but they really are tiny and these were some large shrimp . would the serpents eat a live healthy shrimp ?I have 2 pistol shrimp in there as well , they have not been bothered ( they have lived there for 2 yrs with the original cleaner and some pepps so I do not think it was them ) . because I have 200 lbs of live rock in there it might be awhile before I can catch the kulprit , can anyone recommend a reef friendly cleaner fish for my tangs ? Thanks