Firefish belly is in-dented

[EL Diablo]

I gave the tank my usual inspection when I got in from work to
find that my Purple Firefishs belly in in-dented. He has been fine and ate this morning

I have had him for 4 months

it looks just like his underside was pushed in a little.
Like if you squeezed a piece of clay with your finger.

Other than that He is acting fine

Any ideas whats wrong?

Thanks

 

[EL Diablo]

ok

now his belly looks normal.
That was strange. 8O

 

[Phyl]

It sounds to me like he was hungry! My tang looked like that when we first got him if he hadn't eaten enough. That's exactly how I described it!

 

[SeriousDude5]

Yes I agree he was probley hungry either that or he was reacting to a water changer os some sort.