is this normal behavior for diamond gobies?

[100%hydrophylic]

just got a diamond goby Saturday and hes stirred up the sand pretty bad which is what i expected and wanted, but i noticed that about half the time hes picking stuff off of rocks. i didnt really think they picked around on the rockwork very much, but this one does. at first i didnt really think much of it but ive been thinking maybe theres not enough food in the sandbed and hes looking for more? he eats mysis/brine/cyclopees with the other fish.

[julie180]

I would not worry to much about him. If he is eating with the other fish, he is sure to get enough. He maybe picking pods off the rocks.

[arredondojason]

+1
on what is said above

[iwishtofish]

Mine used to do that, as well as make a mess of the sand. He also loved to swim North, until the flame angel would chase him back down where he belonged! One of my favorite fish.