Lookin for a "Sand sifter"

[daddyjama]

I saw the fish in a store but forgot the name. It hops around the bottome scoops up some sand in his mouth and then the sand goes out from his gills...
What kind of fish is it GOby? Blennie?

 

[tall_90]

a watchman goby will do that.

 

[hatessushi]

Probably a goby. I have a Diamond goby and that's all he does.

 

[cowfishrule]

sleeper head goby also does this.