Help bta in trouble

[Jack biocube 32]

Hey all I have no clue what’s happening to my bta. I have never seen him pull in like this before. Nitrate 3, Amonia 0. All my corals are doing fine but I am little concerned at the state of my bta. He was perfectly healthy this morning

 

[Jack biocube 32]

How it looked this morning

 

[Jack biocube 32]

The rest of my tank now

 

[Jekyl]

Leave it alone. Unless the problem persists, mouth is gaping or losing tentacles there isn't a problem.

 

[Jack biocube 32]

Thanks