Tail Spot Blenny not eating

I've had a Tail Spot Blenny in my tank for about 3 months now. He used to perch himself on a big piece of live rock and he always came out to eat when I fed them. For the last three days he just hides and won't come out to eat. Should I be concerned. Water parameters are fine. I have two tangs and two clowns in there with him and have not noticed them picking on him. Any help would be appreciated.

 

Soak the food in garlic to encourage eating. He may just have enough to keep him happy also. Don't worry unless he starts losing weight.