Valentini Puffer Help

[aheilig]

I have a 75 gallon aquarium and it has been cycling for over a month now. We have had some crabs and shrimp in the tank and every is just perfect. I purchased a Vanentini Puffer and it has been laying on the bottom since last night. It is not breathing heavy and it still swims if something goes near it. It just goes back to sitting on the bottom. When i purchased the valentini I did purchase 2 damsels as tank mates and they are doing just great. Should I be concerned about my puffer. Things I have read said this could be normal.

 

[blaxsun]

Mine was always out and about, but I don't know enough about their behavior to tell you if what yours is doing is normal.