I bought a yellow watchman goby and haven't seen it since the 1st day i put it in. I have two false percula clowns, two high fin cardinals, a bar goby, a tiger pistol shrimp, and a green serpent star. I realize the serpent star could have ate it but it never moves from its spot and i target feed it daily! i know it takes them awhile to acclimate enough to become comfortable enough to come out but i have saw the pistol shrimp many times since then. Is it just burried in the sand? and if so is it probably dead? how long would it take to see the watchman goby and pistol shrimp pair up and see them together?