Got it, also you didn't answer my question if it is a Sleeper Gold Head Goby and what are you feeding. These fish mostly feed by sifting nutrients out of the sand and require mature tanks of at least 6+ months. If they eagerly feed (or want to at least) then it's not as critical though.
Filling in your "My Info" would be helpful so we don't have to ask basic questions like tank size, lighting, filtration, inhabitants, ect..
i.e. Your list in another post:
165 # of live rock
2 yellow faced gobies
1 female swallowtail angel
1 naso tang
1 kole tang
3 scissortail gobies
Your tangs are going to mostly focus on your daily feeding of seaweed so the only fish they are competing with are the damsels, blenny, angel and other gobies.
With the size of the tank and the amount of lr
you have your gobies will get most of their nutrition from sifting the nutrients out of the sand and should require very little extra food.
Feeding on opposite sides of the tank at the same time generally helps shy fish get the food they need. Also is the food you are feeding reaching the bottom since these types of fish are not aggressive eaters that come to the surface like your damsels are for example.