I had bought 5 Ghost Shrimp to add to my 25 Gallon Tank. I soon found 1 dead and whole for that matter and removed it. It was always hard to find all of them at once, but once in awhile I could find 3 or 4. Then I started finding the shedded skin but didn't think to look up what that ment.
Then one day when I was leaving I noticed 1 dead and tore up, figured I would remove it when I got back. But it was gone, probably eaten. Then I had more problems finding them, only 1 at a time, now none. But still only 2 found dead.
I figured the other 3 were probably eaten too. But after reading this and a little more research, I won't count them out. Like I said I did find the shedded skin, they could very well be hiding in the same dynamic hollow rock decoration that my Red-Tailed Shark lives in.