Ghost shrimp?

[Spiderman]

This will sound quite stupid, but I haven't seen my lone cleaner shrimp. I was out of town last Friday to Monday, made a water change Tuesday, and yesterday, I just realized that the shrimp was missing. I don't remember the last time I saw him - probably two days before I left last Thursday's my best guess. I searched the live rock, substrate --- none. He didn't jump out. I'm careful everytime I vacuum the gravel when I make water changes. It's a 25 G SWFO tank with only 7# of live rock. Fish are a royal gramma, 2 percula clowns, a banggai cardinal and a clown goby.

Any theories?

HELP!

 

[austinsdad]

If something happened to him, the crabs could've easily destroyed any remains in 4 days. You may never know. How long had he been in there?