Please help shed some light here...I bought a maxima clam about 2" that was attached to a "purple painted" rock last week from LFS. After acclimating him I put him at the bottom of my tank for further adjusting. The next morning he was off the rock and on the sand bed. He was open so I did not think it was a problem. Two days later he is gone! Eaten by God know who! I was stunned. I have a few crabs, a conch, one fire shrimp and snails, far less of a clean up crew for a 54 gallon reef that is normal. Correct me if I am wrong...scavengers would not go after a healthy clam or would they? Or is it that the clam was not healthy and they knew it??? I would like in time to get another clam, but not until I figure this one out - they are $80 a pop or more. A very expensive snack for somebody. I have a derasa clam in my other tank that I have had a least a year now that is no problem at all.