What should the underside of a green chromis look like?

[saltydad]

A week ago, I purchased two green chromises and have since noticed that their stomach areas appear to be slightly sunken. I have looked at various images of chromises on the net, and many have the same look.
Is this normal? Should I be concerned?
I'll try to post some pics soon.

 

[veni vidi vici]

Are they eating?

 

[saltydad]

Yes, I'm sorry, I should have said they are eating and otherwise healthy. I'm feeding them Marine Cuisine for carnivorous fish once to twice a day.
They are sharing a 90-gallon UniQuarium with a maroon clownfish and about seven hermit crabs. Temp 75, S.G. 24. 90 pounds live rock. Up and running well over a year.
I tried to get a picture, but they are either too fast, or my camera is too slow.

 

[veni vidi vici]

As long as they are eating i would say they are fine,but i know little on fish disease.Try posting in the Fish Disease and Treatment forum here for more informed opinions.
Hope they are fine ,my guess is they are.

 

[saltydad]

Good idea, I'll do that, thanks.