Fish Problem Dont know whats wrong

[pendergast]

i will send you a picture as soon as i can the camera on my phone doesnt work that well. i cant see anything on his scales at all. Tank is a 46gal bowfront, fulval 303 canister filter with carb in it only and a psk100 protein skimmer, and Led lighting, 16lbs of LR, the last fish added was my lion and a lawmower blenny and the blenny seems to be doing fine. the lion and blenny was added about a month ago.