New clam pulsing?

[jasonak]

Hi
I just got a couple of new clams crocea.Theyve been in the tank for a 4 or 5 hours i notice one keeps slowly closing and pulsing? Is this cus hes unhappy where i put him or is he just gettign ajusted?
thanks

 

[mbbuna]

i would give it a little more time. the pulsing you are describing is a coughing reaction