I put my goby and shrimp in on Sunday.
I have yet to see either of them. That's an expensive $60 for me.. for fish I never see. I *think* I heard the shrimp the first night, but never again. And the goby, who knows if he's still around. As soon as I dropped them in, they swam to different rocks on either end of the tank, then disappeared.
If the goby is dead, I blame it on my Hermits... one of them is just way too big. The Randall's goby looks (looked?) like this: Randall's Goby
I'm a bit upset too.. if I don't hear/see anything by Sunday, I'm getting a female Randall's... (the first one was a male). Just in case he's still in there, they could pair up.