Micromussa look bloated

[Megansmith1027]

I have several micromussa in my tank. One looks good (red) but some of the others (blue) look bloated or over extended. The middle seems to puff out rather then being more concave. Is this a sign of anything being wrong?

 

[FMF0331]

Normal behavior , nothing to worry about

 

[Legendary Corals]

Look amazing to me!