Is this normal for a BTA?

[keli]

I came home from school this morning and saw my bta all wrinkled up and "not beautiful". I'm not sure how they're "supposed" to behave when the lights are off, so I wanna make sure it's alright

It ate one krill yesterday, the tank has been set up for over a month now and has two small perculas in it. (see sig)

 

You can see more specs at the page I made for the tank:

here is the page

[Physh1]

That's ok. Don't really judge them too much when the lights are off. They will be closed a good amount of that time.

 

Cameron