Hello to all~ I am pretty new to the world of clam keeping and have my first clam today. I have had him only a few hours and I have done some research before purchasing. I put my new crosea on the sandbed and left him alone (reading that one placement and leave alone) . While watching him thru the glass I noticed that he is gaping some . It's very alert and is responding to the activity around the tank but, there is some gaping. Is this just acclimation? I don't want to loose him. He was purchased locally and only had a short car ride to my aquarium. Any advise would be great. Sherry S.