Clownfish first night in my tank

[FreakingReefing]

Hey,
I just added to clowns to my tank Ocellaris Clownfish i took a peak at night to to see where they were sleeping and noticed they were in the front bottom of the tank swimming hard to stay in one spot.

Is this normal, are they a little too simple to find a better spot to sleep or is that how they sleep? They looked to me like they were really stressed out! any help would be awesome or am i just worrying

 

[pbhere]

Mine did that the first couple of nights before finding a place. I don't think you have anything to worry about.