Can you assess the body condition of this scooter blenny

[Perpetual Novice]

A client of mine added a scooter blenny to his 30 gal cube. I’m pretty sure it has run out of pods now and the fish is in decline. I only see the tank once a month. But I’m not really sure how urgent it is or how to assess the body condition of the fish. Can anyone tell me if it’s healthy? It’s been in the tank about 3 months. It’s behavior is healthy.

 

[blaxsun]

It doesn't look emaciated from the images. If you can see the outline of any bones, ribs (etc.) along the body that's an indication it's not getting enough food.

 

[BaghdadBean]

I hate to argue with the guy above, but that fish is clearly (to me) getting skinny. When they’re healthy you don’t see that dorsal ridge of muscle, they should be fat and filled out all the way from dorsal to ventral. You can clearly see muscular lines, and skeletal ridges won’t be far behind. Let’s not forget that these are related to mandarin dragonets, and they should be chubby, round bodied fish when they’re healthy. Here are some photos of healthy ones for comparison.