When I got my clam (crocea) he was attached to a small snail shell, so I assumed he would not attach to something else.
Well, I placed him on my sand bed (12 inch deep tank, 20k xm 150 watt HQI about 8 inches above + 65 watt powercompact suplementation now...) and now he has attached to the bottom of my tank! I was going to move him up on the rocks, but i couldnt now!
So to cut to the chase... I have basically the same question salty asked... Is it ok to leave him where he is?
I have also seen him "pulse".... which almost looked like he was trying to jump... but idunno...
Is my clam ok where he is???