lion not very active

[JSTR]

How big is the lionfish now?

When they are same like yours, they will spend a considerable amount of time hiding, motionless somewhee, and only really tour the tank in search of food.

As long as the colour is still good and the fish isnt breathing heavy, should be ok. My lions would always go and hid to digest a big meal, kindof like me after Thanksgiving turkey.