Yellow Goby MIA

So I purchase a very small, about 1/2 yellow goby from the fish store. I have a 75 gallon tank with the rocks set up in the middle. Put him in the tank and haven't seen him since. I have about 80 pounds of live rock that have several places for him to hide.

I have look everywhere I can but see nothing. Try to feed everywhere to see if I could see him dart out, nothing. He is not in the overflow and hasn't went carpet surfing.

Any ideas? I spot feed most of the fish so I hoping he gets some food.

Thank has
2 clowns (small)
1 Kole Tang
2 Chromes
1 Cleaner Shrimp
1 Emeral crab
15 Snails
10 Hermits