Strange clownfish behavior

[alveopora guy]

I have had these pair of clowns for half a year now. Last night they were both eating great, but when I woke up one was hanging out in the spot where they sleep. The one also didn’t eat this morning. Normally they both are swimming around all over the tank. I don’t see anything wrong with it either. It has normal breathing and no white poop. I’m confused just wondering if anyone has had similar experience. Thanks

 

[Big G]

How are the fish today?

 

[alveopora guy]

How are the fish today?

Sorry I have been busy with work, and back to normal today. Eating and running around with other clown now. I have noticed that they are pecking at the rocks and sand more now which is kind of weird